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d6139425f5
(shl (or x,c), 3) the same as (shl (add x, c), 3) when x doesn't have any bits from c set. This finishes off PR1135. Before we compiled the block to: to: LBB0_3: ## %bb cmpb $4, %dl sete %dl addb %dl, %cl movb %cl, %dl shlb $2, %dl addb %r8b, %dl shlb $2, %dl movzbl %dl, %edx movl %esi, (%rdi,%rdx,4) leaq 2(%rdx), %r9 movl %esi, (%rdi,%r9,4) leaq 1(%rdx), %r9 movl %esi, (%rdi,%r9,4) addq $3, %rdx movl %esi, (%rdi,%rdx,4) incb %r8b decb %al movb %r8b, %dl jne LBB0_1 Now we produce: LBB0_3: ## %bb cmpb $4, %dl sete %dl addb %dl, %cl movb %cl, %dl shlb $2, %dl addb %r8b, %dl shlb $2, %dl movzbl %dl, %edx movl %esi, (%rdi,%rdx,4) movl %esi, 8(%rdi,%rdx,4) movl %esi, 4(%rdi,%rdx,4) movl %esi, 12(%rdi,%rdx,4) incb %r8b decb %al movb %r8b, %dl jne LBB0_1 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101958 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
2.3 KiB
LLVM
48 lines
2.3 KiB
LLVM
; PR1135
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; 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"
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target triple = "x86_64-apple-darwin10.3"
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; CHECK: movl %{{.*}}, (%rdi,%rdx,4)
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; CHECK: movl %{{.*}}, 8(%rdi,%rdx,4)
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; CHECK: movl %{{.*}}, 4(%rdi,%rdx,4)
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; CHECK: movl %{{.*}}, 12(%rdi,%rdx,4)
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define void @test(i32* nocapture %array, i32 %r0) nounwind ssp noredzone {
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bb.nph:
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br label %bb
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bb: ; preds = %bb, %bb.nph
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%j.010 = phi i8 [ 0, %bb.nph ], [ %14, %bb ] ; <i8> [#uses=1]
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%k.19 = phi i8 [ 0, %bb.nph ], [ %.k.1, %bb ] ; <i8> [#uses=1]
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%i0.08 = phi i8 [ 0, %bb.nph ], [ %15, %bb ] ; <i8> [#uses=3]
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%0 = icmp slt i8 %i0.08, 4 ; <i1> [#uses=1]
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%iftmp.0.0 = select i1 %0, i8 %i0.08, i8 0 ; <i8> [#uses=2]
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%1 = icmp eq i8 %i0.08, 4 ; <i1> [#uses=1]
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%2 = zext i1 %1 to i8 ; <i8> [#uses=1]
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%.k.1 = add i8 %2, %k.19 ; <i8> [#uses=2]
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%3 = shl i8 %.k.1, 2 ; <i8> [#uses=1]
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%4 = add i8 %3, %iftmp.0.0 ; <i8> [#uses=1]
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%5 = shl i8 %4, 2 ; <i8> [#uses=1]
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%6 = zext i8 %5 to i64 ; <i64> [#uses=4]
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%7 = getelementptr inbounds i32* %array, i64 %6 ; <i32*> [#uses=1]
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store i32 %r0, i32* %7, align 4
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%8 = or i64 %6, 2 ; <i64> [#uses=1]
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%9 = getelementptr inbounds i32* %array, i64 %8 ; <i32*> [#uses=1]
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store i32 %r0, i32* %9, align 4
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%10 = or i64 %6, 1 ; <i64> [#uses=1]
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%11 = getelementptr inbounds i32* %array, i64 %10 ; <i32*> [#uses=1]
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store i32 %r0, i32* %11, align 4
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%12 = or i64 %6, 3 ; <i64> [#uses=1]
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%13 = getelementptr inbounds i32* %array, i64 %12 ; <i32*> [#uses=1]
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store i32 %r0, i32* %13, align 4
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%14 = add nsw i8 %j.010, 1 ; <i8> [#uses=2]
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%15 = add i8 %iftmp.0.0, 1 ; <i8> [#uses=1]
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%exitcond = icmp eq i8 %14, 32 ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb
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ret void
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}
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