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llvm-project/llvm/test/CodeGen/PowerPC/frameaddr.ll

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Adding -verify-machineinstrs option to PowerPC tests Currently we have a number of tests that fail with -verify-machineinstrs. To detect this cases earlier we add the option to the testcases with the exception of tests that will currently fail with this option. PR 27456 keeps track of this failures. No code review, as discussed with Hal Finkel. llvm-svn: 277624
2016-08-04 02:17:35 +08:00
; RUN: llc -verify-machineinstrs < %s -mcpu=pwr7 | FileCheck %s
Correct PPC FRAMEADDR lowering using a pseudo-register The old code used to lower FRAMEADDR tried to replicate the logic in the real frame-lowering code that determines whether or not the frame pointer (r31) will be used. When it seemed as through the frame pointer would not be used, the stack pointer (r1) was used instead. Unfortunately, because the stack size is not yet known, this does not work. Instead, this change introduces new always-reserved pseudo-registers (FP and FP8) that are replaced during prologue insertion with the real frame-pointer register (either r1 or r31). It is important that this intrinsic always return a valid frame address because it is used by Clang to store the frame address as part of code generation for __builtin_setjmp. llvm-svn: 177653
2013-03-22 03:03:19 +08:00
target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
target triple = "powerpc64-unknown-linux-gnu"
declare void @llvm.eh.sjlj.longjmp(i8*) #1
define i8* @main() #0 {
entry:
%0 = call i8* @llvm.frameaddress(i32 0)
ret i8* %0
; CHECK: @main
; CHECK: mr 3, 1
}
define i8* @foo() #3 { ; naked
entry:
%0 = call i8* @llvm.frameaddress(i32 0)
ret i8* %0
; CHECK: @foo
; CHECK: mr 3, 1
}
define i8* @bar() #0 {
entry:
%x = alloca [100000 x i8] ; <[100000 x i8]*> [#uses=1]
%x1 = bitcast [100000 x i8]* %x to i8* ; <i8*> [#uses=1]
call void @use(i8* %x1) nounwind
%0 = call i8* @llvm.frameaddress(i32 0)
ret i8* %0
; Note that if we start eliminating non-leaf frame pointers by default, this
; will need to be updated.
; CHECK: @bar
; CHECK: mr 3, 31
}
declare void @use(i8*)
declare i8* @llvm.frameaddress(i32) #2
Update to remove the no-frame-pointer-elim-non-leaf flag if it was set to 'false'. llvm-svn: 189068
2013-08-23 05:28:54 +08:00
attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
Correct PPC FRAMEADDR lowering using a pseudo-register The old code used to lower FRAMEADDR tried to replicate the logic in the real frame-lowering code that determines whether or not the frame pointer (r31) will be used. When it seemed as through the frame pointer would not be used, the stack pointer (r1) was used instead. Unfortunately, because the stack size is not yet known, this does not work. Instead, this change introduces new always-reserved pseudo-registers (FP and FP8) that are replaced during prologue insertion with the real frame-pointer register (either r1 or r31). It is important that this intrinsic always return a valid frame address because it is used by Clang to store the frame address as part of code generation for __builtin_setjmp. llvm-svn: 177653
2013-03-22 03:03:19 +08:00
attributes #1 = { noreturn nounwind }
attributes #2 = { nounwind readnone }
Update to remove the no-frame-pointer-elim-non-leaf flag if it was set to 'false'. llvm-svn: 189068
2013-08-23 05:28:54 +08:00
attributes #3 = { nounwind naked "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
Correct PPC FRAMEADDR lowering using a pseudo-register The old code used to lower FRAMEADDR tried to replicate the logic in the real frame-lowering code that determines whether or not the frame pointer (r31) will be used. When it seemed as through the frame pointer would not be used, the stack pointer (r1) was used instead. Unfortunately, because the stack size is not yet known, this does not work. Instead, this change introduces new always-reserved pseudo-registers (FP and FP8) that are replaced during prologue insertion with the real frame-pointer register (either r1 or r31). It is important that this intrinsic always return a valid frame address because it is used by Clang to store the frame address as part of code generation for __builtin_setjmp. llvm-svn: 177653
2013-03-22 03:03:19 +08:00