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85e7983ab3
This reverts commit r197481, recommiting r197469 with an extra fix. The vastart_save_xmm_regs pseudo-instruction expands to a test and a branch, so it modifies EFLAGS. Mark it so, or else the scheduler might place it in the middle of another test+branch. This fixes a bug exposed by r192750, which changed the initial scheduler to source-order as part of enabling the MI Scheduler for X86. This re-commit changes the VASTART_SAVE_XMM_REGS custom inserter not to try to save %flags, and adds a test that catches the bad behavior of r197469. <rdar://problem/15627766> llvm-svn: 197503
24 lines
798 B
LLVM
24 lines
798 B
LLVM
; RUN: llc %s -o - | FileCheck %s
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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"
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target triple = "x86_64-apple-macosx10.10.0"
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; Check that vastart handling doesn't get between testb and je for the branch.
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define i32 @check_flag(i32 %flags, ...) nounwind {
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entry:
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; CHECK: {{^}} testb $2, %bh
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; CHECK-NOT: test
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; CHECK: {{^}} je
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%and = and i32 %flags, 512
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%tobool = icmp eq i32 %and, 0
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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br label %if.end
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if.end: ; preds = %entry, %if.then
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%hasflag = phi i32 [ 1, %if.then ], [ 0, %entry ]
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ret i32 %hasflag
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}
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