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llvm-mirror/test/CodeGen/PowerPC/restore-r30.ll
Matthias Braun b3a8585bc1 PowerPC: Do not use llc -march in tests.
`llc -march` is problematic because it only switches the target
architecture, but leaves the operating system unchanged. This
occasionally leads to indeterministic tests because the OS from
LLVM_DEFAULT_TARGET_TRIPLE is used.

However we can simply always use `llc -mtriple` instead. This changes
all the tests to do this to avoid people using -march when they copy and
paste parts of tests.

This patch:
- Removes -march if the .ll file already has a matching `target triple`
  directive or -mtriple argument.
- In all other cases changes -march=ppc32/-march=ppc64 to
  -mtriple=ppc32--/-mtriple=ppc64--

See also the discussion in https://reviews.llvm.org/D35287

llvm-svn: 309754
2017-08-01 22:20:41 +00:00

31 lines
998 B
LLVM

; RUN: llc -relocation-model=pic < %s | FileCheck %s
; The load restoring r30 at the end of the function was placed out of order
; relative to its uses as the PIC base pointer.
; This was because the r30 operand was not marked as "def" which allowed
; the post-RA scheduler to move it over other uses of r30.
; CHECK-LABEL: fred
; CHECK: lwz 30, 24(1)
; R30 should not appear in an instruction after it's been restored.
; CHECK-NOT: 30,
target datalayout = "E-m:e-p:32:32-i64:64-n32"
target triple = "powerpc--"
define double @fred(i64 %a) #0 {
entry:
%0 = lshr i64 %a, 32
%conv = trunc i64 %0 to i32
%conv1 = sitofp i32 %conv to double
%mul = fmul double %conv1, 0x41F0000000000000
%and = and i64 %a, 4294967295
%or = or i64 %and, 4841369599423283200
%sub = fadd double %mul, 0xC330000000000000
%1 = bitcast i64 %or to double
%add = fadd double %sub, %1
ret double %add
}
attributes #0 = { norecurse nounwind readnone "target-cpu"="ppc" "use-soft-float"="false" }