mirror of
https://github.com/c64scene-ar/llvm-6502.git
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0a3e33b633
The PPC64 backend had patterns for i32 <-> i64 extensions and truncations that would leave self-moves in the final assembly. Replacing those patterns with ones based on the SUBREG builtins yields better-looking code. Thanks to Jakob and Owen for their suggestions in this matter. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158283 91177308-0d34-0410-b5e6-96231b3b80d8
80 lines
2.4 KiB
LLVM
80 lines
2.4 KiB
LLVM
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-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-freebsd10.0"
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; RUN: llc < %s -march=ppc64 | FileCheck %s
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@a = common global i32 0, align 4
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define void @test1(i32 %c) nounwind {
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.01 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%0 = load volatile i32* @a, align 4, !tbaa !0
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%add = add nsw i32 %0, %c
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store volatile i32 %add, i32* @a, align 4, !tbaa !0
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%inc = add nsw i32 %i.01, 1
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%exitcond = icmp eq i32 %inc, 2048
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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; CHECK: @test1
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; CHECK-NOT: or 3, 3, 3
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; CHECK: mtctr
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; CHECK-NOT: addi
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; CHECK-NOT: cmplwi
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; CHECK: bdnz
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}
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define void @test2(i32 %c, i32 %d) nounwind {
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entry:
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%cmp1 = icmp sgt i32 %d, 0
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br i1 %cmp1, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.body
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%i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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%0 = load volatile i32* @a, align 4, !tbaa !0
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%add = add nsw i32 %0, %c
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store volatile i32 %add, i32* @a, align 4, !tbaa !0
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%inc = add nsw i32 %i.02, 1
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%exitcond = icmp eq i32 %inc, %d
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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; CHECK: @test2
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; CHECK: mtctr
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; CHECK-NOT: addi
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; CHECK-NOT: cmplwi
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; CHECK: bdnz
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}
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define void @test3(i32 %c, i32 %d) nounwind {
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entry:
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%cmp1 = icmp sgt i32 %d, 0
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br i1 %cmp1, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.body
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%i.02 = phi i32 [ %inc, %for.body ], [ 0, %entry ]
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%mul = mul nsw i32 %i.02, %c
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%0 = load volatile i32* @a, align 4, !tbaa !0
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%add = add nsw i32 %0, %mul
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store volatile i32 %add, i32* @a, align 4, !tbaa !0
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%inc = add nsw i32 %i.02, 1
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%exitcond = icmp eq i32 %inc, %d
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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; CHECK: @test3
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; CHECK: mtctr
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; CHECK-NOT: addi
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; CHECK-NOT: cmplwi
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; CHECK: bdnz
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}
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!0 = metadata !{metadata !"int", metadata !1}
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!1 = metadata !{metadata !"omnipotent char", metadata !2}
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!2 = metadata !{metadata !"Simple C/C++ TBAA"}
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