; RUN: opt < %s -sroa -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"
+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.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
define void @test1({ i8, i8 }* %a, { i8, i8 }* %b) {
-; CHECK: @test1
+; CHECK-LABEL: @test1(
; CHECK: %[[gep_a0:.*]] = getelementptr inbounds { i8, i8 }* %a, i64 0, i32 0
; CHECK: %[[a0:.*]] = load i8* %[[gep_a0]], align 16
; CHECK: %[[gep_a1:.*]] = getelementptr inbounds { i8, i8 }* %a, i64 0, i32 1
ret void
}
+define void @test2() {
+; CHECK-LABEL: @test2(
+; CHECK: alloca i16
+; CHECK: load i8* %{{.*}}
+; CHECK: store i8 42, i8* %{{.*}}
+; CHECK: ret void
+
+entry:
+ %a = alloca { i8, i8, i8, i8 }, align 2
+ %gep1 = getelementptr { i8, i8, i8, i8 }* %a, i32 0, i32 1
+ %cast1 = bitcast i8* %gep1 to i16*
+ store volatile i16 0, i16* %cast1
+ %gep2 = getelementptr { i8, i8, i8, i8 }* %a, i32 0, i32 2
+ %result = load i8* %gep2
+ store i8 42, i8* %gep2
+ ret void
+}
+
define void @PR13920(<2 x i64>* %a, i16* %b) {
; Test that alignments on memcpy intrinsics get propagated to loads and stores.
-; CHECK: @PR13920
+; CHECK-LABEL: @PR13920(
; CHECK: load <2 x i64>* %a, align 2
; CHECK: store <2 x i64> {{.*}}, <2 x i64>* {{.*}}, align 2
; CHECK: ret void
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %bptr, i8* %aaptr, i32 16, i32 2, i1 false)
ret void
}
+
+define void @test3(i8* %x) {
+; Test that when we promote an alloca to a type with lower ABI alignment, we
+; provide the needed explicit alignment that code using the alloca may be
+; expecting. However, also check that any offset within an alloca can in turn
+; reduce the alignment.
+; CHECK-LABEL: @test3(
+; CHECK: alloca [22 x i8], align 8
+; CHECK: alloca [18 x i8], align 2
+; CHECK: ret void
+
+entry:
+ %a = alloca { i8*, i8*, i8* }
+ %b = alloca { i8*, i8*, i8* }
+ %a_raw = bitcast { i8*, i8*, i8* }* %a to i8*
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a_raw, i8* %x, i32 22, i32 8, i1 false)
+ %b_raw = bitcast { i8*, i8*, i8* }* %b to i8*
+ %b_gep = getelementptr i8* %b_raw, i32 6
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %b_gep, i8* %x, i32 18, i32 2, i1 false)
+ ret void
+}
+
+define void @test5() {
+; Test that we preserve underaligned loads and stores when splitting.
+; CHECK-LABEL: @test5(
+; CHECK: alloca [9 x i8]
+; CHECK: alloca [9 x i8]
+; CHECK: store volatile double 0.0{{.*}}, double* %{{.*}}, align 1
+; CHECK: load i16* %{{.*}}, align 1
+; CHECK: load double* %{{.*}}, align 1
+; CHECK: store volatile double %{{.*}}, double* %{{.*}}, align 1
+; CHECK: load i16* %{{.*}}, align 1
+; CHECK: ret void
+
+entry:
+ %a = alloca [18 x i8]
+ %raw1 = getelementptr inbounds [18 x i8]* %a, i32 0, i32 0
+ %ptr1 = bitcast i8* %raw1 to double*
+ store volatile double 0.0, double* %ptr1, align 1
+ %weird_gep1 = getelementptr inbounds [18 x i8]* %a, i32 0, i32 7
+ %weird_cast1 = bitcast i8* %weird_gep1 to i16*
+ %weird_load1 = load i16* %weird_cast1, align 1
+
+ %raw2 = getelementptr inbounds [18 x i8]* %a, i32 0, i32 9
+ %ptr2 = bitcast i8* %raw2 to double*
+ %d1 = load double* %ptr1, align 1
+ store volatile double %d1, double* %ptr2, align 1
+ %weird_gep2 = getelementptr inbounds [18 x i8]* %a, i32 0, i32 16
+ %weird_cast2 = bitcast i8* %weird_gep2 to i16*
+ %weird_load2 = load i16* %weird_cast2, align 1
+
+ ret void
+}
+
+define void @test6() {
+; Test that we promote alignment when the underlying alloca switches to one
+; that innately provides it.
+; CHECK-LABEL: @test6(
+; CHECK: alloca double
+; CHECK: alloca double
+; CHECK-NOT: align
+; CHECK: ret void
+
+entry:
+ %a = alloca [16 x i8]
+ %raw1 = getelementptr inbounds [16 x i8]* %a, i32 0, i32 0
+ %ptr1 = bitcast i8* %raw1 to double*
+ store volatile double 0.0, double* %ptr1, align 1
+
+ %raw2 = getelementptr inbounds [16 x i8]* %a, i32 0, i32 8
+ %ptr2 = bitcast i8* %raw2 to double*
+ %val = load double* %ptr1, align 1
+ store volatile double %val, double* %ptr2, align 1
+
+ ret void
+}
+
+define void @test7(i8* %out) {
+; Test that we properly compute the destination alignment when rewriting
+; memcpys as direct loads or stores.
+; CHECK-LABEL: @test7(
+; CHECK-NOT: alloca
+
+entry:
+ %a = alloca [16 x i8]
+ %raw1 = getelementptr inbounds [16 x i8]* %a, i32 0, i32 0
+ %ptr1 = bitcast i8* %raw1 to double*
+ %raw2 = getelementptr inbounds [16 x i8]* %a, i32 0, i32 8
+ %ptr2 = bitcast i8* %raw2 to double*
+
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %raw1, i8* %out, i32 16, i32 0, i1 false)
+; CHECK: %[[val2:.*]] = load double* %{{.*}}, align 1
+; CHECK: %[[val1:.*]] = load double* %{{.*}}, align 1
+
+ %val1 = load double* %ptr2, align 1
+ %val2 = load double* %ptr1, align 1
+
+ store double %val1, double* %ptr1, align 1
+ store double %val2, double* %ptr2, align 1
+
+ call void @llvm.memcpy.p0i8.p0i8.i32(i8* %out, i8* %raw1, i32 16, i32 0, i1 false)
+; CHECK: store double %[[val1]], double* %{{.*}}, align 1
+; CHECK: store double %[[val2]], double* %{{.*}}, align 1
+
+ ret void
+; CHECK: ret void
+}
projects / oota-llvm.git / blobdiff