122 lines
3.2 KiB
LLVM
122 lines
3.2 KiB
LLVM
; RUN: not opt -S %s -passes=verify 2>&1 | FileCheck %s
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; CHECK: Number of label constraints does not match number of callbr dests
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; CHECK-NEXT: #too_few_label_constraints
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define void @too_few_label_constraints() {
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callbr void asm sideeffect "#too_few_label_constraints", "!i"()
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to label %1 [label %2, label %3]
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1:
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ret void
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2:
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ret void
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3:
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ret void
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}
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; CHECK-NOT: Number of label constraints does not match number of callbr dests
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define void @correct_label_constraints() {
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callbr void asm sideeffect "${0:l} ${1:l}", "!i,!i"()
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to label %1 [label %2, label %3]
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1:
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ret void
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2:
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ret void
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3:
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ret void
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}
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; CHECK: Number of label constraints does not match number of callbr dests
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; CHECK-NEXT: #too_many_label_constraints
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define void @too_many_label_constraints() {
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callbr void asm sideeffect "#too_many_label_constraints", "!i,!i,!i"()
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to label %1 [label %2, label %3]
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1:
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ret void
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2:
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ret void
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3:
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ret void
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}
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; CHECK: Label constraints can only be used with callbr
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; CHECK-NEXT: #label_constraint_without_callbr
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define void @label_constraint_without_callbr() {
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call void asm sideeffect "#label_constraint_without_callbr", "!i"()
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ret void
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}
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; CHECK: Number of label constraints does not match number of callbr dests
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; CHECK-NEXT: #callbr_without_label_constraint
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define void @callbr_without_label_constraint() {
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callbr void asm sideeffect "#callbr_without_label_constraint", ""()
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to label %1 [label %2]
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1:
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ret void
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2:
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ret void
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}
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;; Ensure you can use the return value of a callbr in indirect targets.
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;; No issue!
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define i32 @test4(i1 %var) {
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entry:
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%ret = callbr i32 asm sideeffect "#test4", "=r,!i"() to label %normal [label %abnormal]
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normal:
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ret i32 0
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abnormal:
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ret i32 %ret
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}
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;; Tests of the callbr.landingpad intrinsic function.
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declare i32 @llvm.callbr.landingpad.i64(i64)
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define void @callbrpad_bad_type() {
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entry:
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; CHECK: Intrinsic has incorrect argument type!
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; CHECK-NEXT: ptr @llvm.callbr.landingpad.i64
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%foo = call i32 @llvm.callbr.landingpad.i64(i64 42)
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ret void
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}
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declare i32 @llvm.callbr.landingpad.i32(i32)
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define i32 @callbrpad_multi_preds() {
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entry:
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%foo = callbr i32 asm "", "=r,!i"() to label %direct [label %indirect]
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direct:
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br label %indirect
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indirect:
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; CHECK-NEXT: Intrinsic in block must have 1 unique predecessor
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; CHECK-NEXT: %out = call i32 @llvm.callbr.landingpad.i32(i32 %foo)
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%out = call i32 @llvm.callbr.landingpad.i32(i32 %foo)
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ret i32 %out
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}
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define void @callbrpad_wrong_callbr() {
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entry:
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%foo = callbr i32 asm "", "=r,!i"() to label %direct [label %indirect]
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direct:
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; CHECK-NEXT: Intrinsic's corresponding callbr must have intrinsic's parent basic block in indirect destination list
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; CHECK-NEXT: %x = call i32 @llvm.callbr.landingpad.i32(i32 %foo)
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%x = call i32 @llvm.callbr.landingpad.i32(i32 %foo)
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ret void
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indirect:
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ret void
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}
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declare i32 @foo(i32)
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define i32 @test_callbr_landingpad_not_first_inst() {
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entry:
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%0 = callbr i32 asm "", "=r,!i"()
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to label %asm.fallthrough [label %landingpad]
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asm.fallthrough:
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ret i32 42
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landingpad:
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%foo = call i32 @foo(i32 42)
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; CHECK-NEXT: No other instructions may proceed intrinsic
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; CHECK-NEXT: %out = call i32 @llvm.callbr.landingpad.i32(i32 %0)
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%out = call i32 @llvm.callbr.landingpad.i32(i32 %0)
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ret i32 %out
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}
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