418 lines
12 KiB
LLVM
418 lines
12 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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define i32 @sub1(i32 %x) {
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; CHECK-LABEL: @sub1(
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; CHECK-NEXT: [[Y:%.*]] = sub i32 0, [[X:%.*]]
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; CHECK-NEXT: [[Z:%.*]] = sdiv i32 [[Y]], 337
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; CHECK-NEXT: ret i32 [[Z]]
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;
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%y = sub i32 0, %x
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%z = sdiv i32 %y, 337
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ret i32 %z
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}
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define i32 @sub2(i32 %x) {
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; CHECK-LABEL: @sub2(
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; CHECK-NEXT: [[Z:%.*]] = sdiv i32 [[X:%.*]], -337
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; CHECK-NEXT: ret i32 [[Z]]
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;
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%y = sub nsw i32 0, %x
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%z = sdiv i32 %y, 337
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ret i32 %z
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}
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define i1 @shl_icmp(i64 %X) {
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; CHECK-LABEL: @shl_icmp(
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; CHECK-NEXT: [[B:%.*]] = icmp eq i64 [[X:%.*]], 0
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; CHECK-NEXT: ret i1 [[B]]
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;
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%A = shl nuw i64 %X, 2 ; X/4
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%B = icmp eq i64 %A, 0
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ret i1 %B
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}
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define i64 @shl1(i64 %X, ptr %P) {
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; CHECK-LABEL: @shl1(
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; CHECK-NEXT: [[A:%.*]] = and i64 [[X:%.*]], 312
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; CHECK-NEXT: store i64 [[A]], ptr [[P:%.*]], align 4
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; CHECK-NEXT: [[B:%.*]] = shl nuw nsw i64 [[A]], 8
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; CHECK-NEXT: ret i64 [[B]]
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;
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%A = and i64 %X, 312
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store i64 %A, ptr %P ; multiple uses of A.
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%B = shl i64 %A, 8
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ret i64 %B
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}
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define i32 @preserve1(i32 %x) {
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; CHECK-LABEL: @preserve1(
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; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[X:%.*]], 5
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; CHECK-NEXT: ret i32 [[ADD3]]
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;
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%add = add nsw i32 %x, 2
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%add3 = add nsw i32 %add, 3
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ret i32 %add3
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}
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define i8 @nopreserve1(i8 %x) {
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; CHECK-LABEL: @nopreserve1(
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; CHECK-NEXT: [[ADD3:%.*]] = add i8 [[X:%.*]], -126
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; CHECK-NEXT: ret i8 [[ADD3]]
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;
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%add = add nsw i8 %x, 127
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%add3 = add nsw i8 %add, 3
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ret i8 %add3
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}
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define i8 @nopreserve2(i8 %x) {
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; CHECK-LABEL: @nopreserve2(
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; CHECK-NEXT: [[ADD3:%.*]] = add i8 [[X:%.*]], 3
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; CHECK-NEXT: ret i8 [[ADD3]]
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;
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%add = add i8 %x, 1
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%add3 = add nsw i8 %add, 2
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ret i8 %add3
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}
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define i8 @nopreserve3(i8 %A, i8 %B) {
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; CHECK-LABEL: @nopreserve3(
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; CHECK-NEXT: [[Y:%.*]] = add i8 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[ADD:%.*]] = add i8 [[Y]], 20
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; CHECK-NEXT: ret i8 [[ADD]]
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;
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%x = add i8 %A, 10
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%y = add i8 %B, 10
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%add = add nsw i8 %x, %y
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ret i8 %add
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}
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define i8 @nopreserve4(i8 %A, i8 %B) {
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; CHECK-LABEL: @nopreserve4(
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; CHECK-NEXT: [[Y:%.*]] = add i8 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[ADD:%.*]] = add i8 [[Y]], 20
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; CHECK-NEXT: ret i8 [[ADD]]
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;
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%x = add nsw i8 %A, 10
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%y = add nsw i8 %B, 10
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%add = add nsw i8 %x, %y
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ret i8 %add
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}
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define <3 x i32> @shl_nuw_nsw_shuffle_splat_vec(<2 x i8> %x) {
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; CHECK-LABEL: @shl_nuw_nsw_shuffle_splat_vec(
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; CHECK-NEXT: [[T2:%.*]] = zext <2 x i8> [[X:%.*]] to <2 x i32>
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x i32> [[T2]], <2 x i32> poison, <3 x i32> <i32 1, i32 0, i32 1>
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; CHECK-NEXT: [[T3:%.*]] = shl nuw nsw <3 x i32> [[SHUF]], <i32 17, i32 17, i32 17>
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; CHECK-NEXT: ret <3 x i32> [[T3]]
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;
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%t2 = zext <2 x i8> %x to <2 x i32>
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%shuf = shufflevector <2 x i32> %t2, <2 x i32> undef, <3 x i32> <i32 1, i32 0, i32 1>
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%t3 = shl <3 x i32> %shuf, <i32 17, i32 17, i32 17>
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ret <3 x i32> %t3
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}
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; Negative test - if the shuffle mask contains an undef, we bail out to
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; avoid propagating information that may not be used consistently by callers.
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define <3 x i32> @shl_nuw_nsw_shuffle_undef_elt_splat_vec(<2 x i8> %x) {
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; CHECK-LABEL: @shl_nuw_nsw_shuffle_undef_elt_splat_vec(
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; CHECK-NEXT: [[T2:%.*]] = zext <2 x i8> [[X:%.*]] to <2 x i32>
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; CHECK-NEXT: [[SHUF:%.*]] = shufflevector <2 x i32> [[T2]], <2 x i32> poison, <3 x i32> <i32 1, i32 poison, i32 0>
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; CHECK-NEXT: [[T3:%.*]] = shl <3 x i32> [[SHUF]], <i32 17, i32 17, i32 17>
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; CHECK-NEXT: ret <3 x i32> [[T3]]
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;
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%t2 = zext <2 x i8> %x to <2 x i32>
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%shuf = shufflevector <2 x i32> %t2, <2 x i32> undef, <3 x i32> <i32 1, i32 undef, i32 0>
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%t3 = shl <3 x i32> %shuf, <i32 17, i32 17, i32 17>
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ret <3 x i32> %t3
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}
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; Make sure we don't crash on a ConstantExpr shufflevector
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define <vscale x 2 x i64> @mul_nuw_nsw_shuffle_constant_expr(<vscale x 2 x i8> %z) {
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; CHECK-LABEL: @mul_nuw_nsw_shuffle_constant_expr(
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; CHECK-NEXT: [[XX:%.*]] = zext <vscale x 2 x i8> [[Z:%.*]] to <vscale x 2 x i64>
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; CHECK-NEXT: [[T3:%.*]] = mul <vscale x 2 x i64> [[XX]], shufflevector (<vscale x 2 x i64> insertelement (<vscale x 2 x i64> undef, i64 3, i32 0), <vscale x 2 x i64> zeroinitializer, <vscale x 2 x i32> zeroinitializer)
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; CHECK-NEXT: ret <vscale x 2 x i64> [[T3]]
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;
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%xx = zext <vscale x 2 x i8> %z to <vscale x 2 x i64>
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%shuf = shufflevector <vscale x 2 x i64> insertelement (<vscale x 2 x i64> undef, i64 3, i32 0), <vscale x 2 x i64> zeroinitializer, <vscale x 2 x i32> zeroinitializer
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%t3 = mul <vscale x 2 x i64> %shuf, %xx
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ret <vscale x 2 x i64> %t3
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}
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; This could propagate nsw.
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define i32 @neg_sub0_sub_nsw_nsw(i32 %a, i32 %b) {
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; CHECK-LABEL: @neg_sub0_sub_nsw_nsw(
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; CHECK-NEXT: [[C_NEG:%.*]] = sub nsw i32 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: ret i32 [[C_NEG]]
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;
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%c = sub nsw i32 %a, %b
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%d = sub nsw i32 0, %c
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ret i32 %d
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}
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; Must not propagate nsw.
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define i32 @neg_sub_sub_nsw0(i32 %a, i32 %b) {
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; CHECK-LABEL: @neg_sub_sub_nsw0(
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; CHECK-NEXT: [[C_NEG:%.*]] = sub i32 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: ret i32 [[C_NEG]]
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;
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%c = sub nsw i32 %a, %b
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%d = sub i32 0, %c
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ret i32 %d
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}
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; Must not propagate nsw.
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define i32 @neg_sub_sub_nsw1(i32 %a, i32 %b) {
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; CHECK-LABEL: @neg_sub_sub_nsw1(
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; CHECK-NEXT: [[C_NEG:%.*]] = sub i32 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: ret i32 [[C_NEG]]
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;
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%c = sub i32 %a, %b
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%d = sub nsw i32 0, %c
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ret i32 %d
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}
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; This could propagate nsw.
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define i32 @neg_mul_sub_nsw_nsw(i32 %a, i32 %b) {
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; CHECK-LABEL: @neg_mul_sub_nsw_nsw(
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; CHECK-NEXT: [[C_NEG:%.*]] = sub nsw i32 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: ret i32 [[C_NEG]]
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;
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%c = sub nsw i32 %a, %b
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%d = mul nsw i32 -1, %c
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ret i32 %d
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}
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; Must not propagate nsw.
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define i32 @neg_mul_sub_nsw0(i32 %a, i32 %b) {
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; CHECK-LABEL: @neg_mul_sub_nsw0(
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; CHECK-NEXT: [[C_NEG:%.*]] = sub i32 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: ret i32 [[C_NEG]]
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;
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%c = sub nsw i32 %a, %b
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%d = mul i32 -1, %c
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ret i32 %d
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}
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; Must not propagate nsw.
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define i32 @neg_mul_sub_nsw1(i32 %a, i32 %b) {
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; CHECK-LABEL: @neg_mul_sub_nsw1(
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; CHECK-NEXT: [[C_NEG:%.*]] = sub i32 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: ret i32 [[C_NEG]]
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;
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%c = sub i32 %a, %b
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%d = mul nsw i32 -1, %c
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ret i32 %d
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}
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; Must not propagate nsw.
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define i8 @neg_sub_sub2(i16 %a, i16 %b) {
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; CHECK-LABEL: @neg_sub_sub2(
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; CHECK-NEXT: [[C_NEG:%.*]] = sub i16 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: [[D_NEG:%.*]] = trunc i16 [[C_NEG]] to i8
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; CHECK-NEXT: ret i8 [[D_NEG]]
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;
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%c = sub nsw i16 %a, %b
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%d = trunc i16 %c to i8
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%e = sub nsw i8 0, %d
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ret i8 %e
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}
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; Must not propagate nsw.
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define i32 @sub_sub0_nsw_nsw(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @sub_sub0_nsw_nsw(
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; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[B:%.*]], [[C:%.*]]
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; CHECK-NEXT: [[S2:%.*]] = sub i32 [[A:%.*]], [[TMP1]]
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; CHECK-NEXT: ret i32 [[S2]]
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;
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%s1 = sub nsw i32 %a, %b
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%s2 = sub nsw i32 %s1, %c
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ret i32 %s2
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}
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; Must not propagate nsw.
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define i32 @sub_sub1_nsw_nsw(i32 %a, i32 %b, i32 %c) {
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; CHECK-LABEL: @sub_sub1_nsw_nsw(
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; CHECK-NEXT: [[S1_NEG:%.*]] = sub i32 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: [[S2:%.*]] = add i32 [[S1_NEG]], [[C:%.*]]
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; CHECK-NEXT: ret i32 [[S2]]
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;
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%s1 = sub nsw i32 %a, %b
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%s2 = sub nsw i32 %c, %s1
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ret i32 %s2
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}
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define i8 @neg_nsw_freeze(i8 %a1, i8 %a2) {
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; CHECK-LABEL: @neg_nsw_freeze(
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; CHECK-NEXT: [[A_NEG:%.*]] = sub nsw i8 [[A2:%.*]], [[A1:%.*]]
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; CHECK-NEXT: [[FR_NEG:%.*]] = freeze i8 [[A_NEG]]
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; CHECK-NEXT: ret i8 [[FR_NEG]]
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;
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%a = sub nsw i8 %a1, %a2
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%fr = freeze i8 %a
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%neg = sub nsw i8 0, %fr
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ret i8 %neg
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}
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define i8 @neg_nsw_phi(i1 %c, i8 %a1, i8 %a2, i8 %b1, i8 %b2) {
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; CHECK-LABEL: @neg_nsw_phi(
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF:%.*]], label [[ELSE:%.*]]
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; CHECK: if:
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; CHECK-NEXT: [[A_NEG:%.*]] = sub nsw i8 [[A2:%.*]], [[A1:%.*]]
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; CHECK-NEXT: br label [[JOIN:%.*]]
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; CHECK: else:
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; CHECK-NEXT: [[B_NEG:%.*]] = sub nsw i8 [[B2:%.*]], [[B1:%.*]]
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; CHECK-NEXT: br label [[JOIN]]
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; CHECK: join:
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; CHECK-NEXT: [[PHI_NEG:%.*]] = phi i8 [ [[A_NEG]], [[IF]] ], [ [[B_NEG]], [[ELSE]] ]
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; CHECK-NEXT: ret i8 [[PHI_NEG]]
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;
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br i1 %c, label %if, label %else
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if:
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%a = sub nsw i8 %a1, %a2
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br label %join
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else:
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%b = sub nsw i8 %b1, %b2
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br label %join
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join:
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%phi = phi i8 [ %a, %if ], [ %b, %else ]
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%neg = sub nsw i8 0, %phi
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ret i8 %neg
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}
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define i8 @neg_nsw_select(i1 %c, i8 %a1, i8 %a2, i8 %b1, i8 %b2) {
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; CHECK-LABEL: @neg_nsw_select(
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; CHECK-NEXT: [[A_NEG:%.*]] = sub nsw i8 [[A2:%.*]], [[A1:%.*]]
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; CHECK-NEXT: [[B_NEG:%.*]] = sub nsw i8 [[B2:%.*]], [[B1:%.*]]
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; CHECK-NEXT: [[SEL_NEG:%.*]] = select i1 [[C:%.*]], i8 [[A_NEG]], i8 [[B_NEG]]
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; CHECK-NEXT: ret i8 [[SEL_NEG]]
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;
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%a = sub nsw i8 %a1, %a2
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%b = sub nsw i8 %b1, %b2
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%sel = select i1 %c, i8 %a, i8 %b
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%neg = sub nsw i8 0, %sel
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ret i8 %neg
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}
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||
|
|
|
||
|
|
define <4 x i8> @neg_nsw_shufflevector(<2 x i8> %a1, <2 x i8> %a2, <2 x i8> %b1, <2 x i8> %b2) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_shufflevector(
|
||
|
|
; CHECK-NEXT: [[A_NEG:%.*]] = sub nsw <2 x i8> [[A2:%.*]], [[A1:%.*]]
|
||
|
|
; CHECK-NEXT: [[B_NEG:%.*]] = sub nsw <2 x i8> [[B2:%.*]], [[B1:%.*]]
|
||
|
|
; CHECK-NEXT: [[SHUF_NEG:%.*]] = shufflevector <2 x i8> [[A_NEG]], <2 x i8> [[B_NEG]], <4 x i32> <i32 0, i32 1, i32 2, i32 3>
|
||
|
|
; CHECK-NEXT: ret <4 x i8> [[SHUF_NEG]]
|
||
|
|
;
|
||
|
|
%a = sub nsw <2 x i8> %a1, %a2
|
||
|
|
%b = sub nsw <2 x i8> %b1, %b2
|
||
|
|
%shuf = shufflevector <2 x i8> %a, <2 x i8> %b, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
|
||
|
|
%neg = sub nsw <4 x i8> zeroinitializer, %shuf
|
||
|
|
ret <4 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @neg_nsw_extractelement(<2 x i8> %a1, <2 x i8> %a2) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_extractelement(
|
||
|
|
; CHECK-NEXT: [[A_NEG:%.*]] = sub nsw <2 x i8> [[A2:%.*]], [[A1:%.*]]
|
||
|
|
; CHECK-NEXT: [[EXTR_NEG:%.*]] = extractelement <2 x i8> [[A_NEG]], i64 0
|
||
|
|
; CHECK-NEXT: ret i8 [[EXTR_NEG]]
|
||
|
|
;
|
||
|
|
%a = sub nsw <2 x i8> %a1, %a2
|
||
|
|
%extr = extractelement <2 x i8> %a, i32 0
|
||
|
|
%neg = sub nsw i8 0, %extr
|
||
|
|
ret i8 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define <2 x i8> @neg_nsw_insertelement(<2 x i8> %a1, <2 x i8> %a2, i8 %b1, i8 %b2) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_insertelement(
|
||
|
|
; CHECK-NEXT: [[A_NEG:%.*]] = sub nsw <2 x i8> [[A2:%.*]], [[A1:%.*]]
|
||
|
|
; CHECK-NEXT: [[B_NEG:%.*]] = sub nsw i8 [[B2:%.*]], [[B1:%.*]]
|
||
|
|
; CHECK-NEXT: [[INSERT_NEG:%.*]] = insertelement <2 x i8> [[A_NEG]], i8 [[B_NEG]], i64 0
|
||
|
|
; CHECK-NEXT: ret <2 x i8> [[INSERT_NEG]]
|
||
|
|
;
|
||
|
|
%a = sub nsw <2 x i8> %a1, %a2
|
||
|
|
%b = sub nsw i8 %b1, %b2
|
||
|
|
%insert = insertelement <2 x i8> %a, i8 %b, i32 0
|
||
|
|
%neg = sub nsw <2 x i8> zeroinitializer, %insert
|
||
|
|
ret <2 x i8> %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @neg_nsw_shl(i8 %a1, i8 %a2, i8 %b) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_shl(
|
||
|
|
; CHECK-NEXT: [[A_NEG:%.*]] = sub nsw i8 [[A2:%.*]], [[A1:%.*]]
|
||
|
|
; CHECK-NEXT: [[SHL_NEG:%.*]] = shl nsw i8 [[A_NEG]], [[B:%.*]]
|
||
|
|
; CHECK-NEXT: ret i8 [[SHL_NEG]]
|
||
|
|
;
|
||
|
|
%a = sub nsw i8 %a1, %a2
|
||
|
|
%shl = shl nsw i8 %a, %b
|
||
|
|
%neg = sub nsw i8 0, %shl
|
||
|
|
ret i8 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @neg_nsw_shl_missing_nsw_on_shl(i8 %a1, i8 %a2, i8 %b) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_shl_missing_nsw_on_shl(
|
||
|
|
; CHECK-NEXT: [[A_NEG:%.*]] = sub i8 [[A2:%.*]], [[A1:%.*]]
|
||
|
|
; CHECK-NEXT: [[SHL_NEG:%.*]] = shl i8 [[A_NEG]], [[B:%.*]]
|
||
|
|
; CHECK-NEXT: ret i8 [[SHL_NEG]]
|
||
|
|
;
|
||
|
|
%a = sub nsw i8 %a1, %a2
|
||
|
|
%shl = shl i8 %a, %b
|
||
|
|
%neg = sub nsw i8 0, %shl
|
||
|
|
ret i8 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @neg_nsw_shl_to_mul(i8 %a, i8 %b) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_shl_to_mul(
|
||
|
|
; CHECK-NEXT: [[SHL_NEG:%.*]] = mul nsw i8 [[A:%.*]], -2
|
||
|
|
; CHECK-NEXT: ret i8 [[SHL_NEG]]
|
||
|
|
;
|
||
|
|
%shl = shl nsw i8 %a, 1
|
||
|
|
%neg = sub nsw i8 0, %shl
|
||
|
|
ret i8 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @neg_nsw_shl_to_mul_missing_nsw_on_shl(i8 %a, i8 %b) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_shl_to_mul_missing_nsw_on_shl(
|
||
|
|
; CHECK-NEXT: [[SHL_NEG:%.*]] = mul i8 [[A:%.*]], -2
|
||
|
|
; CHECK-NEXT: ret i8 [[SHL_NEG]]
|
||
|
|
;
|
||
|
|
%shl = shl i8 %a, 1
|
||
|
|
%neg = sub nsw i8 0, %shl
|
||
|
|
ret i8 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @neg_nsw_mul(i8 %a1, i8 %a2, i8 %b) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_mul(
|
||
|
|
; CHECK-NEXT: [[A_NEG:%.*]] = sub i8 [[A2:%.*]], [[A1:%.*]]
|
||
|
|
; CHECK-NEXT: [[SHL_NEG:%.*]] = mul nsw i8 [[A_NEG]], [[B:%.*]]
|
||
|
|
; CHECK-NEXT: ret i8 [[SHL_NEG]]
|
||
|
|
;
|
||
|
|
%a = sub nsw i8 %a1, %a2
|
||
|
|
%shl = mul nsw i8 %a, %b
|
||
|
|
%neg = sub nsw i8 0, %shl
|
||
|
|
ret i8 %neg
|
||
|
|
}
|
||
|
|
|
||
|
|
define i8 @neg_nsw_mul_missing_nsw_on_mul(i8 %a1, i8 %a2, i8 %b) {
|
||
|
|
; CHECK-LABEL: @neg_nsw_mul_missing_nsw_on_mul(
|
||
|
|
; CHECK-NEXT: [[A_NEG:%.*]] = sub i8 [[A2:%.*]], [[A1:%.*]]
|
||
|
|
; CHECK-NEXT: [[SHL_NEG:%.*]] = mul i8 [[A_NEG]], [[B:%.*]]
|
||
|
|
; CHECK-NEXT: ret i8 [[SHL_NEG]]
|
||
|
|
;
|
||
|
|
%a = sub nsw i8 %a1, %a2
|
||
|
|
%shl = mul i8 %a, %b
|
||
|
|
%neg = sub nsw i8 0, %shl
|
||
|
|
ret i8 %neg
|
||
|
|
}
|