diff options
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrCompiler.td | 2 | ||||
| -rw-r--r-- | llvm/test/CodeGen/X86/vastart-defs-eflags.ll | 23 |
2 files changed, 24 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86InstrCompiler.td b/llvm/lib/Target/X86/X86InstrCompiler.td index 7d10b67bfe6..11aa80391c2 100644 --- a/llvm/lib/Target/X86/X86InstrCompiler.td +++ b/llvm/lib/Target/X86/X86InstrCompiler.td @@ -72,7 +72,7 @@ def ADJCALLSTACKUP64 : I<0, Pseudo, (outs), (ins i32imm:$amt1, i32imm:$amt2), // x86-64 va_start lowering magic. -let usesCustomInserter = 1 in { +let usesCustomInserter = 1, Defs = [EFLAGS] in { def VASTART_SAVE_XMM_REGS : I<0, Pseudo, (outs), (ins GR8:$al, diff --git a/llvm/test/CodeGen/X86/vastart-defs-eflags.ll b/llvm/test/CodeGen/X86/vastart-defs-eflags.ll new file mode 100644 index 00000000000..6017753fc8f --- /dev/null +++ b/llvm/test/CodeGen/X86/vastart-defs-eflags.ll @@ -0,0 +1,23 @@ +; RUN: llc %s -o - | FileCheck %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-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.10.0" + +; Check that vastart handling doesn't get between testb and je for the branch. +define i32 @check_flag(i32 %flags, ...) nounwind { +entry: +; CHECK: {{^}} testb $2, %bh +; CHECK-NOT: test +; CHECK: {{^}} je + %and = and i32 %flags, 512 + %tobool = icmp eq i32 %and, 0 + br i1 %tobool, label %if.end, label %if.then + +if.then: ; preds = %entry + br label %if.end + +if.end: ; preds = %entry, %if.then + %hasflag = phi i32 [ 1, %if.then ], [ 0, %entry ] + ret i32 %hasflag +} + |
