mirror of
https://github.com/c64scene-ar/llvm-6502.git
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Summary: DataLayout keeps the string used for its creation. As a side effect it is no longer needed in the Module. This is "almost" NFC, the string is no longer canonicalized, you can't rely on two "equals" DataLayout having the same string returned by getStringRepresentation(). Get rid of DataLayoutPass: the DataLayout is in the Module The DataLayout is "per-module", let's enforce this by not duplicating it more than necessary. One more step toward non-optionality of the DataLayout in the module. Make DataLayout Non-Optional in the Module Module->getDataLayout() will never returns nullptr anymore. Reviewers: echristo Subscribers: resistor, llvm-commits, jholewinski Differential Revision: http://reviews.llvm.org/D7992 From: Mehdi Amini <mehdi.amini@apple.com> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231270 91177308-0d34-0410-b5e6-96231b3b80d8
142 lines
5.8 KiB
LLVM
142 lines
5.8 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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; Ensure that type punning using a union of vector and same-sized array
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; generates an extract instead of a shuffle with an uncommon vector size:
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;
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; typedef uint32_t v4i32 __attribute__((vector_size(16)));
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; union { v4i32 v; uint32_t a[4]; };
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;
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; This cleans up behind SROA, which inserts the uncommon vector size when
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; cleaning up the alloca/store/GEP/load.
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; Provide legal integer types.
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target datalayout = "p:32:32"
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; Extracting the zeroth element in an i32 array.
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define i32 @type_pun_zeroth(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_zeroth(
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; CHECK-NEXT: %[[BC:.*]] = bitcast <16 x i8> %in to <4 x i32>
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; CHECK-NEXT: %[[EXT:.*]] = extractelement <4 x i32> %[[BC]], i32 0
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; CHECK-NEXT: ret i32 %[[EXT]]
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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%1 = bitcast <4 x i8> %sroa to i32
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ret i32 %1
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}
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; Extracting the first element in an i32 array.
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define i32 @type_pun_first(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_first(
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; CHECK-NEXT: %[[BC:.*]] = bitcast <16 x i8> %in to <4 x i32>
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; CHECK-NEXT: %[[EXT:.*]] = extractelement <4 x i32> %[[BC]], i32 1
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; CHECK-NEXT: ret i32 %[[EXT]]
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <4 x i32> <i32 4, i32 5, i32 6, i32 7>
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%1 = bitcast <4 x i8> %sroa to i32
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ret i32 %1
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}
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; Extracting an i32 that isn't aligned to any natural boundary.
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define i32 @type_pun_misaligned(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_misaligned(
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; CHECK-NEXT: %[[SHUF:.*]] = shufflevector <16 x i8> %in, <16 x i8> undef, <16 x i32> <i32 6, i32 7, i32 8, i32 9, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
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; CHECK-NEXT: %[[BC:.*]] = bitcast <16 x i8> %[[SHUF]] to <4 x i32>
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; CHECK-NEXT: %[[EXT:.*]] = extractelement <4 x i32> %[[BC]], i32 0
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; CHECK-NEXT: ret i32 %[[EXT]]
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <4 x i32> <i32 6, i32 7, i32 8, i32 9>
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%1 = bitcast <4 x i8> %sroa to i32
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ret i32 %1
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}
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; Type punning to an array of pointers.
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define i32* @type_pun_pointer(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_pointer(
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; CHECK-NEXT: %[[BC:.*]] = bitcast <16 x i8> %in to <4 x i32>
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; CHECK-NEXT: %[[EXT:.*]] = extractelement <4 x i32> %[[BC]], i32 0
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; CHECK-NEXT: %[[I2P:.*]] = inttoptr i32 %[[EXT]] to i32*
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; CHECK-NEXT: ret i32* %[[I2P]]
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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%1 = bitcast <4 x i8> %sroa to i32
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%2 = inttoptr i32 %1 to i32*
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ret i32* %2
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}
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; Type punning to an array of 32-bit floating-point values.
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define float @type_pun_float(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_float(
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; CHECK-NEXT: %[[BC:.*]] = bitcast <16 x i8> %in to <4 x float>
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; CHECK-NEXT: %[[EXT:.*]] = extractelement <4 x float> %[[BC]], i32 0
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; CHECK-NEXT: ret float %[[EXT]]
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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%1 = bitcast <4 x i8> %sroa to float
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ret float %1
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}
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; Type punning to an array of 64-bit floating-point values.
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define double @type_pun_double(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_double(
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; CHECK-NEXT: %[[BC:.*]] = bitcast <16 x i8> %in to <2 x double>
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; CHECK-NEXT: %[[EXT:.*]] = extractelement <2 x double> %[[BC]], i32 0
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; CHECK-NEXT: ret double %[[EXT]]
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
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%1 = bitcast <8 x i8> %sroa to double
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ret double %1
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}
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; Type punning to same-size floating-point and integer values.
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; Verify that multiple uses with different bitcast types are properly handled.
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define { float, i32 } @type_pun_float_i32(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_float_i32(
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; CHECK-NEXT: %[[BCI:.*]] = bitcast <16 x i8> %in to <4 x i32>
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; CHECK-NEXT: %[[EXTI:.*]] = extractelement <4 x i32> %[[BCI]], i32 0
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; CHECK-NEXT: %[[BCF:.*]] = bitcast <16 x i8> %in to <4 x float>
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; CHECK-NEXT: %[[EXTF:.*]] = extractelement <4 x float> %[[BCF]], i32 0
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; CHECK-NEXT: %1 = insertvalue { float, i32 } undef, float %[[EXTF]], 0
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; CHECK-NEXT: %2 = insertvalue { float, i32 } %1, i32 %[[EXTI]], 1
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; CHECK-NEXT: ret { float, i32 } %2
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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%f = bitcast <4 x i8> %sroa to float
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%i = bitcast <4 x i8> %sroa to i32
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%1 = insertvalue { float, i32 } undef, float %f, 0
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%2 = insertvalue { float, i32 } %1, i32 %i, 1
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ret { float, i32 } %2
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}
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; Type punning two i32 values, with control flow.
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; Verify that the bitcast is shared and dominates usage.
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define i32 @type_pun_i32_ctrl(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_i32_ctrl(
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entry: ; CHECK-NEXT: entry:
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; CHECK-NEXT: %[[BC:.*]] = bitcast <16 x i8> %in to <4 x i32>
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; CHECK-NEXT: br
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
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br i1 undef, label %left, label %right
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left: ; CHECK: left:
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; CHECK-NEXT: %[[EXTL:.*]] = extractelement <4 x i32> %[[BC]], i32 0
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; CHECK-NEXT: br
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%lhs = bitcast <4 x i8> %sroa to i32
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br label %tail
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right: ; CHECK: right:
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; CHECK-NEXT: %[[EXTR:.*]] = extractelement <4 x i32> %[[BC]], i32 0
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; CHECK-NEXT: br
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%rhs = bitcast <4 x i8> %sroa to i32
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br label %tail
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tail: ; CHECK: tail:
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; CHECK-NEXT: %i = phi i32 [ %[[EXTL]], %left ], [ %[[EXTR]], %right ]
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; CHECK-NEXT: ret i32 %i
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%i = phi i32 [ %lhs, %left ], [ %rhs, %right ]
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ret i32 %i
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}
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; Extracting a type that won't fit in a vector isn't handled. The function
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; should stay the same.
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define i40 @type_pun_unhandled(<16 x i8> %in) {
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; CHECK-LABEL: @type_pun_unhandled(
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; CHECK-NEXT: %sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <5 x i32> <i32 4, i32 5, i32 6, i32 7, i32 8>
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; CHECK-NEXT: %1 = bitcast <5 x i8> %sroa to i40
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; CHECK-NEXT: ret i40 %1
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%sroa = shufflevector <16 x i8> %in, <16 x i8> undef, <5 x i32> <i32 4, i32 5, i32 6, i32 7, i32 8>
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%1 = bitcast <5 x i8> %sroa to i40
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ret i40 %1
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}
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