094190c2f5
Insert a new intrinsic call after splitting critical edges, and verify it. Later commits will update the SSA values to use this new value along indirect branches rather than the callbr's value, and have SelectionDAG consume this new value. Part 2b of https://discourse.llvm.org/t/rfc-syncing-asm-goto-with-outputs-with-gcc/65453/8. Reviewed By: efriedma, jyknight Differential Revision: https://reviews.llvm.org/D139883
123 lines
3.2 KiB
LLVM
123 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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