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eef813bb47
1.Fix pessimized case in FIXME. 2.Add tests for it. 3.The canonicalisation on shifts results in different sequence for tests of machine-licm.Correct some check lines. Differential Revision: https://reviews.llvm.org/D27916 llvm-svn: 290410
32 lines
838 B
LLVM
32 lines
838 B
LLVM
; RUN: llc -mtriple=armv7-linux-gnueabihf %s -o - | FileCheck %s
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@array = weak global [4 x i32] zeroinitializer
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define i32 @test_lshr_and1(i32 %x) {
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entry:
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;CHECK-LABLE: test_lshr_and1:
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;CHECK: movw r1, :lower16:array
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;CHECK-NEXT: and r0, r0, #12
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;CHECK-NEXT: movt r1, :upper16:array
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;CHECK-NEXT: ldr r0, [r1, r0]
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;CHECK-NEXT: bx lr
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%tmp2 = lshr i32 %x, 2
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%tmp3 = and i32 %tmp2, 3
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%tmp4 = getelementptr [4 x i32], [4 x i32]* @array, i32 0, i32 %tmp3
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%tmp5 = load i32, i32* %tmp4, align 4
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ret i32 %tmp5
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}
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define i32 @test_lshr_and2(i32 %x) {
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entry:
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;CHECK-LABLE: test_lshr_and2:
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;CHECK: ubfx r0, r0, #1, #15
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;CHECK-NEXT: add r0, r0, r0
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;CHECK-NEXT: bx lr
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%a = and i32 %x, 65534
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%b = lshr i32 %a, 1
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%c = and i32 %x, 65535
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%d = lshr i32 %c, 1
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%e = add i32 %b, %d
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ret i32 %e
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}
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