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1c8db50a9a
llvm-6502/test/Transforms/SROA/basictest.ll
Chandler Carruth 1c8db50a9a Port the SSAUpdater-based promotion logic from the old SROA pass to the 
new one, and add support for running the new pass in that mode and in
that slot of the pass manager. With this the new pass can completely
replace the old one within the pipeline.

The strategy for enabling or disabling the SSAUpdater logic is to do it
by making the requirement of the domtree analysis optional. By default,
it is required and we get the standard mem2reg approach. This is usually
the desired strategy when run in stand-alone situations. Within the
CGSCC pass manager, we disable requiring of the domtree analysis and
consequentially trigger fallback to the SSAUpdater promotion.

In theory this would allow the pass to re-use a domtree if one happened
to be available even when run in a mode that doesn't require it. In
practice, it lets us have a single pass rather than two which was
simpler for me to wrap my head around.

There is a hidden flag to force the use of the SSAUpdater code path for
the purpose of testing. The primary testing strategy is just to run the
existing tests through that path. One notable difference is that it has
custom code to handle lifetime markers, and one of the tests has been
enhanced to exercise that code.

This has survived a bootstrap and the test suite without serious
correctness issues, however my run of the test suite produced *very*
alarming performance numbers. I don't entirely understand or trust them
though, so more investigation is on-going.

To aid my understanding of the performance impact of the new SROA now
that it runs throughout the optimization pipeline, I'm enabling it by
default in this commit, and will disable it again once the LNT bots have
picked up one iteration with it. I want to get those bots (which are
much more stable) to evaluate the impact of the change before I jump to
any conclusions.

NOTE: Several Clang tests will fail because they run -O3 and check the
result's order of output. They'll go back to passing once I disable it
again.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163965 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-15 11:43:14 +00:00

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; RUN: opt < %s -sroa -S | FileCheck %s
; RUN: opt < %s -sroa -force-ssa-updater -S | FileCheck %s
target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
declare void @llvm.lifetime.start(i64, i8* nocapture)
declare void @llvm.lifetime.end(i64, i8* nocapture)
define i32 @test0() {
; CHECK: @test0
; CHECK-NOT: alloca
; CHECK: ret i32
entry:
%a1 = alloca i32
%a2 = alloca float
%a1.i8 = bitcast i32* %a1 to i8*
call void @llvm.lifetime.start(i64 4, i8* %a1.i8)
store i32 0, i32* %a1
%v1 = load i32* %a1
call void @llvm.lifetime.end(i64 4, i8* %a1.i8)
%a2.i8 = bitcast float* %a2 to i8*
call void @llvm.lifetime.start(i64 4, i8* %a2.i8)
store float 0.0, float* %a2
%v2 = load float * %a2
%v2.int = bitcast float %v2 to i32
%sum1 = add i32 %v1, %v2.int
call void @llvm.lifetime.end(i64 4, i8* %a2.i8)
ret i32 %sum1
}
define i32 @test1() {
; CHECK: @test1
; CHECK-NOT: alloca
; CHECK: ret i32 0
entry:
%X = alloca { i32, float }
%Y = getelementptr { i32, float }* %X, i64 0, i32 0
store i32 0, i32* %Y
%Z = load i32* %Y
ret i32 %Z
}
define i64 @test2(i64 %X) {
; CHECK: @test2
; CHECK-NOT: alloca
; CHECK: ret i64 %X
entry:
%A = alloca [8 x i8]
%B = bitcast [8 x i8]* %A to i64*
store i64 %X, i64* %B
br label %L2
L2:
%Z = load i64* %B
ret i64 %Z
}
define void @test3(i8* %dst, i8* %src) {
; CHECK: @test3
entry:
%a = alloca [300 x i8]
; CHECK-NOT: alloca
; CHECK: %[[test3_a1:.*]] = alloca [42 x i8]
; CHECK-NEXT: %[[test3_a2:.*]] = alloca [99 x i8]
; CHECK-NEXT: %[[test3_a3:.*]] = alloca [16 x i8]
; CHECK-NEXT: %[[test3_a4:.*]] = alloca [42 x i8]
; CHECK-NEXT: %[[test3_a5:.*]] = alloca [7 x i8]
; CHECK-NEXT: %[[test3_a6:.*]] = alloca [7 x i8]
; CHECK-NEXT: %[[test3_a7:.*]] = alloca [85 x i8]
%b = getelementptr [300 x i8]* %a, i64 0, i64 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %b, i8* %src, i32 300, i32 1, i1 false)
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a1]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %src, i32 42
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 42
; CHECK-NEXT: %[[test3_r1:.*]] = load i8* %[[gep]]
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 43
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [99 x i8]* %[[test3_a2]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 99
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 142
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 16
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 158
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a4]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 42
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 200
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 207
; CHECK-NEXT: %[[test3_r2:.*]] = load i8* %[[gep]]
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 208
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 215
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [85 x i8]* %[[test3_a7]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 85
; Clobber a single element of the array, this should be promotable.
%c = getelementptr [300 x i8]* %a, i64 0, i64 42
store i8 0, i8* %c
; Make a sequence of overlapping stores to the array. These overlap both in
; forward strides and in shrinking accesses.
%overlap.1.i8 = getelementptr [300 x i8]* %a, i64 0, i64 142
%overlap.2.i8 = getelementptr [300 x i8]* %a, i64 0, i64 143
%overlap.3.i8 = getelementptr [300 x i8]* %a, i64 0, i64 144
%overlap.4.i8 = getelementptr [300 x i8]* %a, i64 0, i64 145
%overlap.5.i8 = getelementptr [300 x i8]* %a, i64 0, i64 146
%overlap.6.i8 = getelementptr [300 x i8]* %a, i64 0, i64 147
%overlap.7.i8 = getelementptr [300 x i8]* %a, i64 0, i64 148
%overlap.8.i8 = getelementptr [300 x i8]* %a, i64 0, i64 149
%overlap.9.i8 = getelementptr [300 x i8]* %a, i64 0, i64 150
%overlap.1.i16 = bitcast i8* %overlap.1.i8 to i16*
%overlap.1.i32 = bitcast i8* %overlap.1.i8 to i32*
%overlap.1.i64 = bitcast i8* %overlap.1.i8 to i64*
%overlap.2.i64 = bitcast i8* %overlap.2.i8 to i64*
%overlap.3.i64 = bitcast i8* %overlap.3.i8 to i64*
%overlap.4.i64 = bitcast i8* %overlap.4.i8 to i64*
%overlap.5.i64 = bitcast i8* %overlap.5.i8 to i64*
%overlap.6.i64 = bitcast i8* %overlap.6.i8 to i64*
%overlap.7.i64 = bitcast i8* %overlap.7.i8 to i64*
%overlap.8.i64 = bitcast i8* %overlap.8.i8 to i64*
%overlap.9.i64 = bitcast i8* %overlap.9.i8 to i64*
store i8 1, i8* %overlap.1.i8
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 0
; CHECK-NEXT: store i8 1, i8* %[[gep]]
store i16 1, i16* %overlap.1.i16
; CHECK-NEXT: %[[bitcast:.*]] = bitcast [16 x i8]* %[[test3_a3]] to i16*
; CHECK-NEXT: store i16 1, i16* %[[bitcast]]
store i32 1, i32* %overlap.1.i32
; CHECK-NEXT: %[[bitcast:.*]] = bitcast [16 x i8]* %[[test3_a3]] to i32*
; CHECK-NEXT: store i32 1, i32* %[[bitcast]]
store i64 1, i64* %overlap.1.i64
; CHECK-NEXT: %[[bitcast:.*]] = bitcast [16 x i8]* %[[test3_a3]] to i64*
; CHECK-NEXT: store i64 1, i64* %[[bitcast]]
store i64 2, i64* %overlap.2.i64
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 1
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
; CHECK-NEXT: store i64 2, i64* %[[bitcast]]
store i64 3, i64* %overlap.3.i64
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 2
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
; CHECK-NEXT: store i64 3, i64* %[[bitcast]]
store i64 4, i64* %overlap.4.i64
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 3
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
; CHECK-NEXT: store i64 4, i64* %[[bitcast]]
store i64 5, i64* %overlap.5.i64
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 4
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
; CHECK-NEXT: store i64 5, i64* %[[bitcast]]
store i64 6, i64* %overlap.6.i64
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 5
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
; CHECK-NEXT: store i64 6, i64* %[[bitcast]]
store i64 7, i64* %overlap.7.i64
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 6
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
; CHECK-NEXT: store i64 7, i64* %[[bitcast]]
store i64 8, i64* %overlap.8.i64
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 7
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
; CHECK-NEXT: store i64 8, i64* %[[bitcast]]
store i64 9, i64* %overlap.9.i64
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 8
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i64*
; CHECK-NEXT: store i64 9, i64* %[[bitcast]]
; Make two sequences of overlapping stores with more gaps and irregularities.
%overlap2.1.0.i8 = getelementptr [300 x i8]* %a, i64 0, i64 200
%overlap2.1.1.i8 = getelementptr [300 x i8]* %a, i64 0, i64 201
%overlap2.1.2.i8 = getelementptr [300 x i8]* %a, i64 0, i64 202
%overlap2.1.3.i8 = getelementptr [300 x i8]* %a, i64 0, i64 203
%overlap2.2.0.i8 = getelementptr [300 x i8]* %a, i64 0, i64 208
%overlap2.2.1.i8 = getelementptr [300 x i8]* %a, i64 0, i64 209
%overlap2.2.2.i8 = getelementptr [300 x i8]* %a, i64 0, i64 210
%overlap2.2.3.i8 = getelementptr [300 x i8]* %a, i64 0, i64 211
%overlap2.1.0.i16 = bitcast i8* %overlap2.1.0.i8 to i16*
%overlap2.1.0.i32 = bitcast i8* %overlap2.1.0.i8 to i32*
%overlap2.1.1.i32 = bitcast i8* %overlap2.1.1.i8 to i32*
%overlap2.1.2.i32 = bitcast i8* %overlap2.1.2.i8 to i32*
%overlap2.1.3.i32 = bitcast i8* %overlap2.1.3.i8 to i32*
store i8 1, i8* %overlap2.1.0.i8
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 0
; CHECK-NEXT: store i8 1, i8* %[[gep]]
store i16 1, i16* %overlap2.1.0.i16
; CHECK-NEXT: %[[bitcast:.*]] = bitcast [7 x i8]* %[[test3_a5]] to i16*
; CHECK-NEXT: store i16 1, i16* %[[bitcast]]
store i32 1, i32* %overlap2.1.0.i32
; CHECK-NEXT: %[[bitcast:.*]] = bitcast [7 x i8]* %[[test3_a5]] to i32*
; CHECK-NEXT: store i32 1, i32* %[[bitcast]]
store i32 2, i32* %overlap2.1.1.i32
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 1
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
; CHECK-NEXT: store i32 2, i32* %[[bitcast]]
store i32 3, i32* %overlap2.1.2.i32
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 2
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
; CHECK-NEXT: store i32 3, i32* %[[bitcast]]
store i32 4, i32* %overlap2.1.3.i32
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 3
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
; CHECK-NEXT: store i32 4, i32* %[[bitcast]]
%overlap2.2.0.i32 = bitcast i8* %overlap2.2.0.i8 to i32*
%overlap2.2.1.i16 = bitcast i8* %overlap2.2.1.i8 to i16*
%overlap2.2.1.i32 = bitcast i8* %overlap2.2.1.i8 to i32*
%overlap2.2.2.i32 = bitcast i8* %overlap2.2.2.i8 to i32*
%overlap2.2.3.i32 = bitcast i8* %overlap2.2.3.i8 to i32*
store i32 1, i32* %overlap2.2.0.i32
; CHECK-NEXT: %[[bitcast:.*]] = bitcast [7 x i8]* %[[test3_a6]] to i32*
; CHECK-NEXT: store i32 1, i32* %[[bitcast]]
store i8 1, i8* %overlap2.2.1.i8
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 1
; CHECK-NEXT: store i8 1, i8* %[[gep]]
store i16 1, i16* %overlap2.2.1.i16
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 1
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
; CHECK-NEXT: store i16 1, i16* %[[bitcast]]
store i32 1, i32* %overlap2.2.1.i32
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 1
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
; CHECK-NEXT: store i32 1, i32* %[[bitcast]]
store i32 3, i32* %overlap2.2.2.i32
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 2
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
; CHECK-NEXT: store i32 3, i32* %[[bitcast]]
store i32 4, i32* %overlap2.2.3.i32
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 3
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i32*
; CHECK-NEXT: store i32 4, i32* %[[bitcast]]
%overlap2.prefix = getelementptr i8* %overlap2.1.1.i8, i64 -4
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %overlap2.prefix, i8* %src, i32 8, i32 1, i1 false)
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a4]], i64 0, i64 39
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %src, i32 3
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 3
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 5
; Bridge between the overlapping areas
call void @llvm.memset.p0i8.i32(i8* %overlap2.1.2.i8, i8 42, i32 8, i32 1, i1 false)
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 2
; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* %[[gep]], i8 42, i32 5
; ...promoted i8 store...
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* %[[gep]], i8 42, i32 2
; Entirely within the second overlap.
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %overlap2.2.1.i8, i8* %src, i32 5, i32 1, i1 false)
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 1
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep]], i8* %src, i32 5
; Trailing past the second overlap.
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %overlap2.2.2.i8, i8* %src, i32 8, i32 1, i1 false)
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 2
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep]], i8* %src, i32 5
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 5
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [85 x i8]* %[[test3_a7]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 3
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %b, i32 300, i32 1, i1 false)
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a1]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %[[gep]], i32 42
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 42
; CHECK-NEXT: store i8 0, i8* %[[gep]]
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 43
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [99 x i8]* %[[test3_a2]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 99
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 142
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [16 x i8]* %[[test3_a3]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 16
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 158
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [42 x i8]* %[[test3_a4]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 42
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 200
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a5]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 207
; CHECK-NEXT: store i8 42, i8* %[[gep]]
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 208
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test3_a6]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 215
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [85 x i8]* %[[test3_a7]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 85
ret void
}
define void @test4(i8* %dst, i8* %src) {
; CHECK: @test4
entry:
%a = alloca [100 x i8]
; CHECK-NOT: alloca
; CHECK: %[[test4_a1:.*]] = alloca [20 x i8]
; CHECK-NEXT: %[[test4_a2:.*]] = alloca [7 x i8]
; CHECK-NEXT: %[[test4_a3:.*]] = alloca [10 x i8]
; CHECK-NEXT: %[[test4_a4:.*]] = alloca [7 x i8]
; CHECK-NEXT: %[[test4_a5:.*]] = alloca [7 x i8]
; CHECK-NEXT: %[[test4_a6:.*]] = alloca [40 x i8]
%b = getelementptr [100 x i8]* %a, i64 0, i64 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %b, i8* %src, i32 100, i32 1, i1 false)
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [20 x i8]* %[[test4_a1]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep]], i8* %src, i32 20
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 20
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
; CHECK-NEXT: %[[test4_r1:.*]] = load i16* %[[bitcast]]
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 22
; CHECK-NEXT: %[[test4_r2:.*]] = load i8* %[[gep]]
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 23
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a2]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 30
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [10 x i8]* %[[test4_a3]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 10
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 40
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
; CHECK-NEXT: %[[test4_r3:.*]] = load i16* %[[bitcast]]
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 42
; CHECK-NEXT: %[[test4_r4:.*]] = load i8* %[[gep]]
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 43
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a4]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 50
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
; CHECK-NEXT: %[[test4_r5:.*]] = load i16* %[[bitcast]]
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %src, i64 52
; CHECK-NEXT: %[[test4_r6:.*]] = load i8* %[[gep]]
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 53
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a5]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds i8* %src, i64 60
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [40 x i8]* %[[test4_a6]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 40
%a.src.1 = getelementptr [100 x i8]* %a, i64 0, i64 20
%a.dst.1 = getelementptr [100 x i8]* %a, i64 0, i64 40
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a.dst.1, i8* %a.src.1, i32 10, i32 1, i1 false)
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a4]], i64 0, i64 0
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a2]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; Clobber a single element of the array, this should be promotable, and be deleted.
%c = getelementptr [100 x i8]* %a, i64 0, i64 42
store i8 0, i8* %c
%a.src.2 = getelementptr [100 x i8]* %a, i64 0, i64 50
call void @llvm.memmove.p0i8.p0i8.i32(i8* %a.dst.1, i8* %a.src.2, i32 10, i32 1, i1 false)
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a4]], i64 0, i64 0
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a5]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %b, i32 100, i32 1, i1 false)
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds [20 x i8]* %[[test4_a1]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %[[gep]], i32 20
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 20
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
; CHECK-NEXT: store i16 %[[test4_r1]], i16* %[[bitcast]]
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 22
; CHECK-NEXT: store i8 %[[test4_r2]], i8* %[[gep]]
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 23
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a2]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 30
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [10 x i8]* %[[test4_a3]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 10
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 40
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
; CHECK-NEXT: store i16 %[[test4_r5]], i16* %[[bitcast]]
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 42
; CHECK-NEXT: store i8 %[[test4_r6]], i8* %[[gep]]
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 43
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a4]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 50
; CHECK-NEXT: %[[bitcast:.*]] = bitcast i8* %[[gep]] to i16*
; CHECK-NEXT: store i16 %[[test4_r5]], i16* %[[bitcast]]
; CHECK-NEXT: %[[gep:.*]] = getelementptr inbounds i8* %dst, i64 52
; CHECK-NEXT: store i8 %[[test4_r6]], i8* %[[gep]]
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 53
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [7 x i8]* %[[test4_a5]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 7
; CHECK-NEXT: %[[gep_dst:.*]] = getelementptr inbounds i8* %dst, i64 60
; CHECK-NEXT: %[[gep_src:.*]] = getelementptr inbounds [40 x i8]* %[[test4_a6]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[gep_dst]], i8* %[[gep_src]], i32 40
ret void
}
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
define i16 @test5() {
; CHECK: @test5
; CHECK: alloca float
; CHECK: ret i16 %
entry:
%a = alloca [4 x i8]
%fptr = bitcast [4 x i8]* %a to float*
store float 0.0, float* %fptr
%ptr = getelementptr [4 x i8]* %a, i32 0, i32 2
%iptr = bitcast i8* %ptr to i16*
%val = load i16* %iptr
ret i16 %val
}
define i32 @test6() {
; CHECK: @test6
; CHECK: alloca i32
; CHECK-NEXT: store volatile i32
; CHECK-NEXT: load i32*
; CHECK-NEXT: ret i32
entry:
%a = alloca [4 x i8]
%ptr = getelementptr [4 x i8]* %a, i32 0, i32 0
call void @llvm.memset.p0i8.i32(i8* %ptr, i8 42, i32 4, i32 1, i1 true)
%iptr = bitcast i8* %ptr to i32*
%val = load i32* %iptr
ret i32 %val
}
define void @test7(i8* %src, i8* %dst) {
; CHECK: @test7
; CHECK: alloca i32
; CHECK-NEXT: bitcast i8* %src to i32*
; CHECK-NEXT: load volatile i32*
; CHECK-NEXT: store volatile i32
; CHECK-NEXT: bitcast i8* %dst to i32*
; CHECK-NEXT: load volatile i32*
; CHECK-NEXT: store volatile i32
; CHECK-NEXT: ret
entry:
%a = alloca [4 x i8]
%ptr = getelementptr [4 x i8]* %a, i32 0, i32 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %src, i32 4, i32 1, i1 true)
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr, i32 4, i32 1, i1 true)
ret void
}
%S1 = type { i32, i32, [16 x i8] }
%S2 = type { %S1*, %S2* }
define %S2 @test8(%S2* %s2) {
; CHECK: @test8
entry:
%new = alloca %S2
; CHECK-NOT: alloca
%s2.next.ptr = getelementptr %S2* %s2, i64 0, i32 1
%s2.next = load %S2** %s2.next.ptr
; CHECK: %[[gep:.*]] = getelementptr %S2* %s2, i64 0, i32 1
; CHECK-NEXT: %[[next:.*]] = load %S2** %[[gep]]
%s2.next.s1.ptr = getelementptr %S2* %s2.next, i64 0, i32 0
%s2.next.s1 = load %S1** %s2.next.s1.ptr
%new.s1.ptr = getelementptr %S2* %new, i64 0, i32 0
store %S1* %s2.next.s1, %S1** %new.s1.ptr
%s2.next.next.ptr = getelementptr %S2* %s2.next, i64 0, i32 1
%s2.next.next = load %S2** %s2.next.next.ptr
%new.next.ptr = getelementptr %S2* %new, i64 0, i32 1
store %S2* %s2.next.next, %S2** %new.next.ptr
; CHECK-NEXT: %[[gep:.*]] = getelementptr %S2* %[[next]], i64 0, i32 0
; CHECK-NEXT: %[[next_s1:.*]] = load %S1** %[[gep]]
; CHECK-NEXT: %[[gep:.*]] = getelementptr %S2* %[[next]], i64 0, i32 1
; CHECK-NEXT: %[[next_next:.*]] = load %S2** %[[gep]]
%new.s1 = load %S1** %new.s1.ptr
%result1 = insertvalue %S2 undef, %S1* %new.s1, 0
; CHECK-NEXT: %[[result1:.*]] = insertvalue %S2 undef, %S1* %[[next_s1]], 0
%new.next = load %S2** %new.next.ptr
%result2 = insertvalue %S2 %result1, %S2* %new.next, 1
; CHECK-NEXT: %[[result2:.*]] = insertvalue %S2 %[[result1]], %S2* %[[next_next]], 1
ret %S2 %result2
; CHECK-NEXT: ret %S2 %[[result2]]
}
define i64 @test9() {
; Ensure we can handle loads off the end of an alloca even when wrapped in
; weird bit casts and types. The result is undef, but this shouldn't crash
; anything.
; CHECK: @test9
; CHECK-NOT: alloca
; CHECK: ret i64 undef
entry:
%a = alloca { [3 x i8] }
%gep1 = getelementptr inbounds { [3 x i8] }* %a, i32 0, i32 0, i32 0
store i8 0, i8* %gep1, align 1
%gep2 = getelementptr inbounds { [3 x i8] }* %a, i32 0, i32 0, i32 1
store i8 0, i8* %gep2, align 1
%gep3 = getelementptr inbounds { [3 x i8] }* %a, i32 0, i32 0, i32 2
store i8 26, i8* %gep3, align 1
%cast = bitcast { [3 x i8] }* %a to { i64 }*
%elt = getelementptr inbounds { i64 }* %cast, i32 0, i32 0
%result = load i64* %elt
ret i64 %result
}
define %S2* @test10() {
; CHECK: @test10
; CHECK-NOT: alloca %S2*
; CHECK: ret %S2* null
entry:
%a = alloca [8 x i8]
%ptr = getelementptr [8 x i8]* %a, i32 0, i32 0
call void @llvm.memset.p0i8.i32(i8* %ptr, i8 0, i32 8, i32 1, i1 false)
%s2ptrptr = bitcast i8* %ptr to %S2**
%s2ptr = load %S2** %s2ptrptr
ret %S2* %s2ptr
}
define i32 @test11() {
; CHECK: @test11
; CHECK-NOT: alloca
; CHECK: ret i32 0
entry:
%X = alloca i32
br i1 undef, label %good, label %bad
good:
%Y = getelementptr i32* %X, i64 0
store i32 0, i32* %Y
%Z = load i32* %Y
ret i32 %Z
bad:
%Y2 = getelementptr i32* %X, i64 1
store i32 0, i32* %Y2
%Z2 = load i32* %Y2
ret i32 %Z2
}
define i32 @test12() {
; CHECK: @test12
; CHECK: alloca i24
;
; FIXME: SROA should promote accesses to this into whole i24 operations instead
; of i8 operations.
; CHECK: store i8 0
; CHECK: store i8 0
; CHECK: store i8 0
;
; CHECK: load i24*
entry:
%a = alloca [3 x i8]
%b0ptr = getelementptr [3 x i8]* %a, i64 0, i32 0
store i8 0, i8* %b0ptr
%b1ptr = getelementptr [3 x i8]* %a, i64 0, i32 1
store i8 0, i8* %b1ptr
%b2ptr = getelementptr [3 x i8]* %a, i64 0, i32 2
store i8 0, i8* %b2ptr
%iptr = bitcast [3 x i8]* %a to i24*
%i = load i24* %iptr
%ret = zext i24 %i to i32
ret i32 %ret
}
define i32 @test13() {
; Ensure we don't crash and handle undefined loads that straddle the end of the
; allocation.
; CHECK: @test13
; CHECK: %[[ret:.*]] = zext i16 undef to i32
; CHECK: ret i32 %[[ret]]
entry:
%a = alloca [3 x i8]
%b0ptr = getelementptr [3 x i8]* %a, i64 0, i32 0
store i8 0, i8* %b0ptr
%b1ptr = getelementptr [3 x i8]* %a, i64 0, i32 1
store i8 0, i8* %b1ptr
%b2ptr = getelementptr [3 x i8]* %a, i64 0, i32 2
store i8 0, i8* %b2ptr
%iptrcast = bitcast [3 x i8]* %a to i16*
%iptrgep = getelementptr i16* %iptrcast, i64 1
%i = load i16* %iptrgep
%ret = zext i16 %i to i32
ret i32 %ret
}
%test14.struct = type { [3 x i32] }
define void @test14(...) nounwind uwtable {
; This is a strange case where we split allocas into promotable partitions, but
; also gain enough data to prove they must be dead allocas due to GEPs that walk
; across two adjacent allocas. Test that we don't try to promote or otherwise
; do bad things to these dead allocas, they should just be removed.
; CHECK: @test14
; CHECK-NEXT: entry:
; CHECK-NEXT: ret void
entry:
%a = alloca %test14.struct
%p = alloca %test14.struct*
%0 = bitcast %test14.struct* %a to i8*
%1 = getelementptr i8* %0, i64 12
%2 = bitcast i8* %1 to %test14.struct*
%3 = getelementptr inbounds %test14.struct* %2, i32 0, i32 0
%4 = getelementptr inbounds %test14.struct* %a, i32 0, i32 0
%5 = bitcast [3 x i32]* %3 to i32*
%6 = bitcast [3 x i32]* %4 to i32*
%7 = load i32* %6, align 4
store i32 %7, i32* %5, align 4
%8 = getelementptr inbounds i32* %5, i32 1
%9 = getelementptr inbounds i32* %6, i32 1
%10 = load i32* %9, align 4
store i32 %10, i32* %8, align 4
%11 = getelementptr inbounds i32* %5, i32 2
%12 = getelementptr inbounds i32* %6, i32 2
%13 = load i32* %12, align 4
store i32 %13, i32* %11, align 4
ret void
}
define i32 @test15(i1 %flag) nounwind uwtable {
; Ensure that when there are dead instructions using an alloca that are not
; loads or stores we still delete them during partitioning and rewriting.
; Otherwise we'll go to promote them while thy still have unpromotable uses.
; CHECK: @test15
; CHECK-NEXT: entry:
; CHECK-NEXT: br label %loop
; CHECK: loop:
; CHECK-NEXT: br label %loop
entry:
%l0 = alloca i64
%l1 = alloca i64
%l2 = alloca i64
%l3 = alloca i64
br label %loop
loop:
%dead3 = phi i8* [ %gep3, %loop ], [ null, %entry ]
store i64 1879048192, i64* %l0, align 8
%bc0 = bitcast i64* %l0 to i8*
%gep0 = getelementptr i8* %bc0, i64 3
%dead0 = bitcast i8* %gep0 to i64*
store i64 1879048192, i64* %l1, align 8
%bc1 = bitcast i64* %l1 to i8*
%gep1 = getelementptr i8* %bc1, i64 3
%dead1 = getelementptr i8* %gep1, i64 1
store i64 1879048192, i64* %l2, align 8
%bc2 = bitcast i64* %l2 to i8*
%gep2.1 = getelementptr i8* %bc2, i64 1
%gep2.2 = getelementptr i8* %bc2, i64 3
; Note that this select should get visited multiple times due to using two
; different GEPs off the same alloca. We should only delete it once.
%dead2 = select i1 %flag, i8* %gep2.1, i8* %gep2.2
store i64 1879048192, i64* %l3, align 8
%bc3 = bitcast i64* %l3 to i8*
%gep3 = getelementptr i8* %bc3, i64 3
br label %loop
}
define void @test16(i8* %src, i8* %dst) {
; Ensure that we can promote an alloca of [3 x i8] to an i24 SSA value.
; CHECK: @test16
; CHECK-NOT: alloca
; CHECK: %[[srccast:.*]] = bitcast i8* %src to i24*
; CHECK-NEXT: load i24* %[[srccast]]
; CHECK-NEXT: %[[dstcast:.*]] = bitcast i8* %dst to i24*
; CHECK-NEXT: store i24 0, i24* %[[dstcast]]
; CHECK-NEXT: ret void
entry:
%a = alloca [3 x i8]
%ptr = getelementptr [3 x i8]* %a, i32 0, i32 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %src, i32 4, i32 1, i1 false)
%cast = bitcast i8* %ptr to i24*
store i24 0, i24* %cast
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr, i32 4, i32 1, i1 false)
ret void
}
define void @test17(i8* %src, i8* %dst) {
; Ensure that we can rewrite unpromotable memcpys which extend past the end of
; the alloca.
; CHECK: @test17
; CHECK: %[[a:.*]] = alloca [3 x i8]
; CHECK-NEXT: %[[ptr:.*]] = getelementptr [3 x i8]* %[[a]], i32 0, i32 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[ptr]], i8* %src,
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %[[ptr]],
; CHECK-NEXT: ret void
entry:
%a = alloca [3 x i8]
%ptr = getelementptr [3 x i8]* %a, i32 0, i32 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %src, i32 4, i32 1, i1 true)
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr, i32 4, i32 1, i1 true)
ret void
}
define void @test18(i8* %src, i8* %dst, i32 %size) {
; Preserve transfer instrinsics with a variable size, even if they overlap with
; fixed size operations. Further, continue to split and promote allocas preceding
; the variable sized intrinsic.
; CHECK: @test18
; CHECK: %[[a:.*]] = alloca [34 x i8]
; CHECK: %[[srcgep1:.*]] = getelementptr inbounds i8* %src, i64 4
; CHECK-NEXT: %[[srccast1:.*]] = bitcast i8* %[[srcgep1]] to i32*
; CHECK-NEXT: %[[srcload:.*]] = load i32* %[[srccast1]]
; CHECK-NEXT: %[[agep1:.*]] = getelementptr inbounds [34 x i8]* %[[a]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %[[agep1]], i8* %src, i32 %size,
; CHECK-NEXT: %[[agep2:.*]] = getelementptr inbounds [34 x i8]* %[[a]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memset.p0i8.i32(i8* %[[agep2]], i8 42, i32 %size,
; CHECK-NEXT: %[[dstcast1:.*]] = bitcast i8* %dst to i32*
; CHECK-NEXT: store i32 42, i32* %[[dstcast1]]
; CHECK-NEXT: %[[dstgep1:.*]] = getelementptr inbounds i8* %dst, i64 4
; CHECK-NEXT: %[[dstcast2:.*]] = bitcast i8* %[[dstgep1]] to i32*
; CHECK-NEXT: store i32 %[[srcload]], i32* %[[dstcast2]]
; CHECK-NEXT: %[[agep3:.*]] = getelementptr inbounds [34 x i8]* %[[a]], i64 0, i64 0
; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %[[agep3]], i32 %size,
; CHECK-NEXT: ret void
entry:
%a = alloca [42 x i8]
%ptr = getelementptr [42 x i8]* %a, i32 0, i32 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr, i8* %src, i32 8, i32 1, i1 false)
%ptr2 = getelementptr [42 x i8]* %a, i32 0, i32 8
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr2, i8* %src, i32 %size, i32 1, i1 false)
call void @llvm.memset.p0i8.i32(i8* %ptr2, i8 42, i32 %size, i32 1, i1 false)
%cast = bitcast i8* %ptr to i32*
store i32 42, i32* %cast
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr, i32 8, i32 1, i1 false)
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dst, i8* %ptr2, i32 %size, i32 1, i1 false)
ret void
}
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