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8eb1aaac9c
- Implement copying ASR to/from GPR regs. - Mark ASRs as non-allocatable, so it won't try to arbitrarily use them inappropriately. - Instead of inserting explicit WRASR/RDASR nodes in the MUL/DIV routines, just do normal register copies. - Also...mark div as using Y, not just writing it. Added a test case with some code which previously died with an assertion failure (with -O0), or produced wrong code (otherwise). (Third time's the charm?) Differential Revision: http://reviews.llvm.org/D10401 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241686 91177308-0d34-0410-b5e6-96231b3b80d8
22 lines
616 B
LLVM
22 lines
616 B
LLVM
; RUN: llc < %s -march=sparc | FileCheck %s
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; RUN: llc -O0 < %s -march=sparc | FileCheck %s
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;; llc -O0 used to try to spill Y to the stack, which isn't possible,
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;; and then crashed. Additionally, in -O1, it would omit the second
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;; apparently-redundant wr to %y, which is not actually redundant
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;; because the spec says to treat %y as potentially-written by udiv.
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; CHECK-LABEL: two_divides:
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; CHECK: wr %g0, %g0, %y
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; CHECK: udiv
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; CHECK: wr %g0, %g0, %y
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; CHECK: udiv
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; CHECK: add
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define i32 @two_divides(i32 %a, i32 %b) {
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%r = udiv i32 %a, %b
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%r2 = udiv i32 %b, %a
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%r3 = add i32 %r, %r2
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ret i32 %r3
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}
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