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[PowerPC] 32-bit ELF PIC support

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This adds initial support for PPC32 ELF PIC (Position Independent Code; the
-fPIC variety), thus rectifying a long-standing deficiency in the PowerPC
backend.

Patch by Justin Hibbits!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213427 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2014-07-18 23:29:49 +00:00
parent 286fbd19f3
commit d644d17dd4
20 changed files with 396 additions and 41 deletions
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53
test/CodeGen/PowerPC/stack-realign.ll
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@@ -1,5 +1,7 @@
; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 < %s | FileCheck %s
; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 -disable-fp-elim < %s | FileCheck -check-prefix=CHECK-FP %s
; RUN: llc -mtriple=powerpc-unknown-linux-gnu -disable-fp-elim < %s | FileCheck -check-prefix=CHECK-32 %s
; RUN: llc -mtriple=powerpc-unknown-linux-gnu -disable-fp-elim -relocation-model=pic < %s | FileCheck -check-prefix=CHECK-32-PIC %s
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"
@@ -7,6 +9,8 @@ target triple = "powerpc64-unknown-linux-gnu"
declare void @bar(i32*)
@barbaz = external global i32
define void @goo(%struct.s* byval nocapture readonly %a) {
entry:
%x = alloca [2 x i32], align 32
@@ -16,8 +20,9 @@ entry:
store i32 %0, i32* %arrayidx, align 32
%b = getelementptr inbounds %struct.s* %a, i64 0, i32 1
%1 = load i32* %b, align 4
%2 = load i32* @barbaz, align 4
%arrayidx2 = getelementptr inbounds [2 x i32]* %x, i64 0, i64 1
store i32 %1, i32* %arrayidx2, align 4
store i32 %2, i32* %arrayidx2, align 4
call void @bar(i32* %arrayidx)
ret void
}
@@ -69,6 +74,24 @@ entry:
; CHECK-FP-DAG: mtlr 0
; CHECK-FP: blr
; CHECK-32-LABEL: @goo
; CHECK-32-DAG: mflr 0
; CHECK-32-DAG: rlwinm [[REG:[0-9]+]], 1, 0, 27, 31
; CHECK-32-DAG: stw 30, -8(1)
; CHECK-32-DAG: mr 30, 1
; CHECK-32-DAG: stw 0, 4(1)
; CHECK-32-DAG: subfic 0, [[REG]], -64
; CHECK-32: stwux 1, 1, 0
; CHECK-32-PIC-LABEL: @goo
; CHECK-32-PIC-DAG: mflr 0
; CHECK-32-PIC-DAG: rlwinm [[REG:[0-9]+]], 1, 0, 27, 31
; CHECK-32-PIC-DAG: stw 29, -12(1)
; CHECK-32-PIC-DAG: mr 29, 1
; CHECK-32-PIC-DAG: stw 0, 4(1)
; CHECK-32-PIC-DAG: subfic 0, [[REG]], -64
; CHECK-32-PIC: stwux 1, 1, 0
; The large-frame-size case.
define void @hoo(%struct.s* byval nocapture readonly %a) {
entry:
@@ -99,6 +122,34 @@ entry:
; CHECK: blr
; CHECK-32-LABEL: @hoo
; CHECK-32-DAG: lis [[REG1:[0-9]+]], -13
; CHECK-32-DAG: rlwinm [[REG3:[0-9]+]], 1, 0, 27, 31
; CHECK-32-DAG: mflr 0
; CHECK-32-DAG: ori [[REG2:[0-9]+]], [[REG1]], 51904
; CHECK-32-DAG: stw 30, -8(1)
; CHECK-32-DAG: mr 30, 1
; CHECK-32-DAG: stw 0, 4(1)
; CHECK-32-DAG: subfc 0, [[REG3]], [[REG2]]
; CHECK-32: stwux 1, 1, 0
; CHECK-32: blr
; CHECK-32-PIC-LABEL: @hoo
; CHECK-32-PIC-DAG: lis [[REG1:[0-9]+]], -13
; CHECK-32-PIC-DAG: rlwinm [[REG3:[0-9]+]], 1, 0, 27, 31
; CHECK-32-PIC-DAG: mflr 0
; CHECK-32-PIC-DAG: ori [[REG2:[0-9]+]], [[REG1]], 51904
; CHECK-32-PIC-DAG: stw 29, -12(1)
; CHECK-32-PIC-DAG: mr 29, 1
; CHECK-32-PIC-DAG: stw 0, 4(1)
; CHECK-32-PIC-DAG: subfc 0, [[REG3]], [[REG2]]
; CHECK-32: stwux 1, 1, 0
; CHECK-32: blr
; Make sure that the FP save area is still allocated correctly relative to
; where r30 is saved.
define void @loo(%struct.s* byval nocapture readonly %a) {