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af0734bc33
Before this instruction supported output values, it fit fairly naturally as a terminator. However, being a terminator while also supporting outputs causes some trouble, as the physreg->vreg COPY operations cannot be in the same block. Modeling it as a non-terminator allows it to be handled the same way as invoke is handled already. Most of the changes here were created by auditing all the existing users of MachineBasicBlock::isEHPad() and MachineBasicBlock::hasEHPadSuccessor(), and adding calls to isInlineAsmBrIndirectTarget or mayHaveInlineAsmBr, as appropriate. Reviewed By: nickdesaulniers, void Differential Revision: https://reviews.llvm.org/D79794
77 lines
2.0 KiB
LLVM
77 lines
2.0 KiB
LLVM
; RUN: not opt -S %s -verify 2>&1 | FileCheck %s
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; CHECK: Indirect label missing from arglist.
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; CHECK-NEXT: #test1
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define void @test1() {
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; The %4 in the indirect label list is not found in the blockaddresses in the
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; arg list (bad).
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callbr void asm sideeffect "#test1", "X,X"(i8* blockaddress(@test1, %3), i8* blockaddress(@test1, %2))
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to label %1 [label %4, 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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3:
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ret void
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4:
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ret void
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}
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; CHECK-NOT: Indirect label missing from arglist.
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define void @test2() {
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; %4 and %2 are both in the indirect label list and the arg list (good).
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callbr void asm sideeffect "${0:l} ${1:l}", "X,X"(i8* blockaddress(@test2, %4), i8* blockaddress(@test2, %2))
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to label %1 [label %4, label %2]
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1:
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ret void
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2:
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ret void
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3:
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ret void
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4:
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ret void
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}
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; CHECK-NOT: Indirect label missing from arglist.
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define void @test3() {
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; note %2 blockaddress. Such a case is possible when passing the address of
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; a label as an input to the inline asm (both address of label and asm goto
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; use blockaddress constants; we're testing that the indirect label list from
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; the asm goto is in the arg list to the asm).
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callbr void asm sideeffect "${0:l} ${1:l} ${2:l}", "X,X,X"(i8* blockaddress(@test3, %4), i8* blockaddress(@test3, %2), i8* blockaddress(@test3, %3))
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to label %1 [label %3, label %4]
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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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4:
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ret void
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}
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;; Ensure you cannot use the return value of a callbr in indirect targets.
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; CHECK: Instruction does not dominate all uses!
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; CHECK-NEXT: #test4
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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,X"(i8* blockaddress(@test4, %abnormal)) 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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;; Ensure you cannot specify the same label as both normal and indirect targets.
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; CHECK: Duplicate callbr destination!
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; CHECK-NEXT: #test5
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define i32 @test5() {
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entry:
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%ret = callbr i32 asm sideeffect "#test5", "=r,X"(i8* blockaddress(@test5, %both)) to label %both [label %both]
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both:
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ret i32 0
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}
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