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5fe7f3e187
Trace through multiple COPYs when looking for a physreg source. Add hinting for vregs that will be copied into physregs (we only hinted for vregs getting copied to a physreg previously). Give hinted a register a bonus when deciding which value to spill. This is part of my rewrite regallocfast series. In fact this one doesn't even have an effect unless you also flip the allocation to happen from back to front of a basic block. Nonetheless it helps to split this up to ease review of D52010 Patch by Matthias Braun llvm-svn: 360887
39 lines
933 B
LLVM
39 lines
933 B
LLVM
; RUN: llc < %s -O0 -fast-isel-abort=1 -mtriple i686-apple-darwin10 | FileCheck %s
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; RUN: llc < %s -O0 -fast-isel-abort=1 -mtriple x86_64-apple-darwin10 | FileCheck %s
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define zeroext i8 @test1(i32 %y) nounwind {
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%conv = trunc i32 %y to i8
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ret i8 %conv
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; CHECK-LABEL: test1:
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; CHECK: movzbl {{.*}}, %eax
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}
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define signext i8 @test2(i32 %y) nounwind {
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%conv = trunc i32 %y to i8
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ret i8 %conv
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; CHECK-LABEL: test2:
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; CHECK: movsbl {{.*}}, %eax
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}
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define zeroext i16 @test3(i32 %y) nounwind {
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%conv = trunc i32 %y to i16
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ret i16 %conv
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; CHECK-LABEL: test3:
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; CHECK: movzwl {{.*}}, %eax
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}
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define signext i16 @test4(i32 %y) nounwind {
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%conv = trunc i32 %y to i16
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ret i16 %conv
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; CHECK-LABEL: test4:
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; CHECK: {{(movswl.%di, %eax|cwtl)}}
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}
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define zeroext i1 @test5(i32 %y) nounwind {
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%conv = trunc i32 %y to i1
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ret i1 %conv
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; CHECK-LABEL: test5:
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; CHECK: andb $1
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; CHECK: movzbl {{.*}}, %eax
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}
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