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[InstCombine] Don't strip function type casts from musttail calls
Summary: The cast simplifications that instcombine does here do not make any attempt to obey the verifier rules for musttail calls. Therefore we have to disable them. Reviewers: efriedma, majnemer, pcc Subscribers: hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D45186 llvm-svn: 329027
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,32 @@ | ||
; RUN: opt -instcombine -S < %s | FileCheck %s | ||
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; These are both direct calls, but make sure instcombine leaves the casts | ||
; alone. | ||
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define i32 @call_thunk(i32 %x, i32 %y) { | ||
%r = call i32 bitcast (void (i32, ...)* @inc_first_arg_thunk to i32 (i32, i32)*)(i32 %x, i32 %y) | ||
ret i32 %r | ||
} | ||
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; CHECK-LABEL: define i32 @call_thunk(i32 %x, i32 %y) | ||
; CHECK: %r = call i32 bitcast (void (i32, ...)* @inc_first_arg_thunk to i32 (i32, i32)*)(i32 %x, i32 %y) | ||
; CHECK: ret i32 %r | ||
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define internal void @inc_first_arg_thunk(i32 %arg1, ...) #0 { | ||
entry: | ||
%inc = add i32 %arg1, 1 | ||
musttail call void (i32, ...) bitcast (i32 (i32, i32)* @plus to void (i32, ...)*)(i32 %inc, ...) | ||
ret void | ||
} | ||
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; CHECK-LABEL: define internal void @inc_first_arg_thunk(i32 %arg1, ...) #0 | ||
; CHECK: %inc = add i32 %arg1, 1 | ||
; CHECK: musttail call void (i32, ...) bitcast (i32 (i32, i32)* @plus to void (i32, ...)*)(i32 %inc, ...) | ||
; CHECK: ret void | ||
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define internal i32 @plus(i32 %x, i32 %y) { | ||
%r = add i32 %x, %y | ||
ret i32 %r | ||
} | ||
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attributes #0 = { "thunk" } |