28 lines
1.1 KiB
LLVM
28 lines
1.1 KiB
LLVM
; RUN: llc < %s -march=x86 -fixup-byte-word-insts=0 | FileCheck %s -check-prefix=CHECK -check-prefix=BWOFF
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; RUN: llc < %s -march=x86 -fixup-byte-word-insts=1 | FileCheck %s -check-prefix=CHECK -check-prefix=BWON
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; These transforms are turned off for load volatiles and stores.
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; Check that they weren't turned off for all loads and stores!
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; CHECK-LABEL: f:
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; CHECK-NOT: movsd
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; BWOFF: movw
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; BWON: movzwl
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; CHECK: addw
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@atomic = global double 0.000000e+00 ; <double*> [#uses=1]
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@atomic2 = global double 0.000000e+00 ; <double*> [#uses=1]
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@ioport = global i32 0 ; <i32*> [#uses=1]
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@ioport2 = global i32 0 ; <i32*> [#uses=1]
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define i16 @f(i64 %x) {
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%b = bitcast i64 %x to double ; <double> [#uses=1]
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store double %b, double* @atomic
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store double 0.000000e+00, double* @atomic2
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%l = load i32, i32* @ioport ; <i32> [#uses=1]
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%t = trunc i32 %l to i16 ; <i16> [#uses=1]
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%l2 = load i32, i32* @ioport2 ; <i32> [#uses=1]
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%tmp = lshr i32 %l2, 16 ; <i32> [#uses=1]
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%t2 = trunc i32 %tmp to i16 ; <i16> [#uses=1]
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%f = add i16 %t, %t2 ; <i16> [#uses=1]
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ret i16 %f
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}
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