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[PowerPC] Load BlockAddress values from the TOC in 64-bit SVR4 code

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Since block address values can be larger than 2GB in 64-bit code, they
cannot be loaded simply using an @l / @ha pair, but instead must be
loaded from the TOC, just like GlobalAddress, ConstantPool, and
JumpTable values are.

The commit also fixes a bug in PPCLinuxAsmPrinter::doFinalization where
temporary labels could not be used as TOC values, since code would
attempt (and fail) to use GetOrCreateSymbol to create a symbol of the
same name as the temporary label.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220959 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ulrich Weigand
2014-10-31 10:33:14 +00:00
parent 42187d2c00
commit 8a9c531e9a
5 changed files with 63 additions and 10 deletions
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26
test/CodeGen/PowerPC/blockaddress.ll Normal file
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; RUN: llc < %s -code-model=small -march=ppc64 -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s -check-prefix=SMALL
; RUN: llc < %s -code-model=medium -march=ppc64 -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s -check-prefix=MEDIUM
; RUN: llc < %s -code-model=large -march=ppc64 -mtriple=powerpc64-unknown-linux-gnu | FileCheck %s -check-prefix=MEDIUM
; RUN: llc < %s -code-model=small -march=ppc64 -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s -check-prefix=SMALL
; RUN: llc < %s -code-model=medium -march=ppc64 -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s -check-prefix=MEDIUM
; RUN: llc < %s -code-model=large -march=ppc64 -mtriple=powerpc64le-unknown-linux-gnu | FileCheck %s -check-prefix=MEDIUM
define i8* @test() {
entry:
br label %here
here: ; preds = %entry
; MEDIUM: .Ltmp[[TMP0:[0-9]+]]:
; MEDIUM: addis [[R0:[0-9]+]], 2, .LC[[LC0:[0-9]+]]@toc@ha
; MEDIUM: ld 3, .LC[[LC0]]@toc@l([[R0]])
; MEDIUM: blr
; MEDIUM: .LC[[LC0]]:
; MEDIUM: .tc .Ltmp[[TMP0]][TC],.Ltmp[[TMP0]]
; SMALL: .Ltmp[[TMP0:[0-9]+]]:
; SMALL: ld 3, .LC[[LC0:[0-9]+]]@toc(2)
; SMALL: blr
; SMALL: .LC[[LC0]]:
; SMALL: .tc .Ltmp[[TMP0]][TC],.Ltmp[[TMP0]]
ret i8* blockaddress(@test, %here)
}