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c8837e431b
A trunc from i32 to i1 on x86_64 generates an instruction such as %vreg19<def> = COPY %vreg9:sub_8bit<kill>; GR8:%vreg19 GR32:%vreg9 However, the copy here should only have the kill flag on the 32-bit path, not the 64-bit one. Otherwise, we are killing the source of the truncate which could be used later in the program. llvm-svn: 236890
41 lines
1.5 KiB
LLVM
41 lines
1.5 KiB
LLVM
; RUN: llc %s -o - -fast-isel=true -O1 -verify-machineinstrs | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-unknown"
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; This test failed the machine verifier because the trunc at the start of the
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; method was extracing a subreg and killing the source register. The kill flag was
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; invalid here as the source of the trunc could still be used elsewhere.
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; CHECK-LABEL: @test
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define i32 @test(i32 %block8x8) {
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bb:
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%tmp9 = trunc i32 %block8x8 to i1
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%tmp10 = zext i1 %tmp9 to i32
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%tmp11 = mul i32 %tmp10, 8
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%tmp12 = zext i32 %tmp11 to i64
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br label %bb241
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bb241: ; preds = %bb241, %bb
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%lsr.iv3 = phi i64 [ %lsr.iv.next4, %bb241 ], [ %tmp12, %bb ]
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%lsr.iv1 = phi i32 [ %lsr.iv.next2, %bb241 ], [ 0, %bb ]
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%lsr.iv.next2 = add nuw nsw i32 %lsr.iv1, 1
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%lsr.iv.next4 = add i64 %lsr.iv3, 32
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%exitcond = icmp eq i32 %lsr.iv.next2, 8
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br i1 %exitcond, label %.preheader.preheader, label %bb241
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.preheader.preheader: ; preds = %bb241
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%tmp18 = lshr i32 %block8x8, 1
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br label %bb270
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bb270: ; preds = %bb270, %.preheader.preheader
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%lsr.iv = phi i32 [ %lsr.iv.next, %bb270 ], [ %tmp18, %.preheader.preheader ]
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%lsr.iv.next = add i32 %lsr.iv, 4
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%tmp272 = icmp slt i32 %lsr.iv.next, 100
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br i1 %tmp272, label %bb270, label %.loopexit
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.loopexit: ; preds = %bb270
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ret i32 0
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}
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