53 lines
1.6 KiB
LLVM
53 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=arm64_32-apple-ios %s -aarch64-enable-sink-fold=true -o - | FileCheck %s
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; If %base < 96 then the sum will not wrap (in an unsigned sense), but "ldr w0,
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; [x0, #-96]" would.
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define i32 @test_valid_wrap(i32 %base) {
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; CHECK-LABEL: test_valid_wrap:
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; CHECK: ; %bb.0:
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; CHECK-NEXT: sub w8, w0, #96
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; CHECK-NEXT: ldr w0, [x8]
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; CHECK-NEXT: ret
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%newaddr = add nuw i32 %base, -96
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%ptr = inttoptr i32 %newaddr to ptr
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%val = load i32, ptr %ptr
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ret i32 %val
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}
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define i8 @test_valid_wrap_optimizable(ptr %base) {
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; CHECK-LABEL: test_valid_wrap_optimizable:
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; CHECK: ; %bb.0:
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; CHECK-NEXT: ldurb w0, [x0, #-96]
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; CHECK-NEXT: ret
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%newaddr = getelementptr inbounds i8, ptr %base, i32 -96
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%val = load i8, ptr %newaddr
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ret i8 %val
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}
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define i8 @test_valid_wrap_optimizable1(ptr %base, i32 %offset) {
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; CHECK-LABEL: test_valid_wrap_optimizable1:
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; CHECK: ; %bb.0:
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; CHECK-NEXT: ldrb w0, [x0, w1, sxtw]
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; CHECK-NEXT: ret
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%newaddr = getelementptr inbounds i8, ptr %base, i32 %offset
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%val = load i8, ptr %newaddr
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ret i8 %val
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}
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;
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define i8 @test_valid_wrap_optimizable2(ptr %base, i32 %offset) {
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; CHECK-LABEL: test_valid_wrap_optimizable2:
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; CHECK: ; %bb.0:
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; CHECK-NEXT: mov w8, #-100 ; =0xffffff9c
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; CHECK-NEXT: ; kill: def $w1 killed $w1 def $x1
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; CHECK-NEXT: ldrb w0, [x8, w1, sxtw]
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; CHECK-NEXT: ret
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%newaddr = getelementptr inbounds i8, ptr inttoptr(i32 -100 to ptr), i32 %offset
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%val = load i8, ptr %newaddr
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ret i8 %val
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}
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