derek.holloway
7502bf64a4
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179 lines
7.8 KiB
LLVM
179 lines
7.8 KiB
LLVM
; This test verifies whether we can outline a singleton instance (i.e., an instance that does not repeat)
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; by running two codegen rounds.
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; This test also verifies if caches for the two-round codegens are correctly working.
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; REQUIRES: asserts
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; RUN: rm -rf %t
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; RUN: split-file %s %t
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; 0. Base case without a cache.
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; Verify each outlining instance is singleton with the global outlining for thinlto.
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; They will be identical, which can be folded by the linker with ICF.
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; RUN: opt -module-hash -module-summary %t/thin-one.ll -o %t/thin-one.bc
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; RUN: opt -module-hash -module-summary %t/thin-two.ll -o %t/thin-two.bc
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; RUN: llvm-lto2 run %t/thin-one.bc %t/thin-two.bc -o %t/thinlto \
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; RUN: -r %t/thin-one.bc,_f3,px -r %t/thin-one.bc,_g,x \
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; RUN: -r %t/thin-two.bc,_f1,px -r %t/thin-two.bc,_f2,px -r %t/thin-two.bc,_g,x \
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; RUN: -codegen-data-thinlto-two-rounds
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; thin-one.ll will have one outlining instance (matched in the global outlined hash tree)
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; RUN: llvm-objdump -d %t/thinlto.1 | FileCheck %s --check-prefix=THINLTO-1
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; THINLTO-1: _OUTLINED_FUNCTION{{.*}}>:
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; THINLTO-1-NEXT: mov
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; THINLTO-1-NEXT: mov
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; THINLTO-1-NEXT: b
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; thin-two.ll will have two outlining instances (matched in the global outlined hash tree)
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; RUN: llvm-objdump -d %t/thinlto.2 | FileCheck %s --check-prefix=THINLTO-2
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; THINLTO-2: _OUTLINED_FUNCTION{{.*}}>:
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; THINLTO-2-NEXT: mov
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; THINLTO-2-NEXT: mov
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; THINLTO-2-NEXT: b
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; THINLTO-2: _OUTLINED_FUNCTION{{.*}}>:
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; THINLTO-2-NEXT: mov
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; THINLTO-2-NEXT: mov
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; THINLTO-2-NEXT: b
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; 1. Run this with a cache for the first time.
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; RUN: rm -rf %t.cache
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; RUN: llvm-lto2 run %t/thin-one.bc %t/thin-two.bc -o %t/thinlto-cold \
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; RUN: -r %t/thin-one.bc,_f3,px -r %t/thin-one.bc,_g,x \
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; RUN: -r %t/thin-two.bc,_f1,px -r %t/thin-two.bc,_f2,px -r %t/thin-two.bc,_g,x \
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; RUN: -codegen-data-thinlto-two-rounds -cache-dir %t.cache -debug-only=lto -thinlto-threads 1 > %t.log-cold.txt 2>&1
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; RUN: cat %t.log-cold.txt | FileCheck %s --check-prefix=COLD
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; diff %t/thinlto.1 %t/thinlto-cold.1
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; diff %t/thinlto.2 %t/thinlto-cold.2
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; COLD: [FirstRound] Cache Miss for {{.*}}thin-one.bc
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; COLD: [FirstRound] Cache Miss for {{.*}}thin-two.bc
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; COLD: [SecondRound] Cache Miss for {{.*}}thin-one.bc
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; COLD: [SecondRound] Cache Miss for {{.*}}thin-two.bc
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; There are two input bitcode files and each one is operated with 3 caches:
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; CG/IR caches for the first round and the second round CG cache.
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; So the total number of files are 2 * 3 = 6.
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; RUN: ls %t.cache | count 6
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; 2. Without any changes, simply re-running it will hit the cache.
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; RUN: llvm-lto2 run %t/thin-one.bc %t/thin-two.bc -o %t/thinlto-warm \
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; RUN: -r %t/thin-one.bc,_f3,px -r %t/thin-one.bc,_g,x \
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; RUN: -r %t/thin-two.bc,_f1,px -r %t/thin-two.bc,_f2,px -r %t/thin-two.bc,_g,x \
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; RUN: -codegen-data-thinlto-two-rounds -cache-dir %t.cache -debug-only=lto -thinlto-threads 1 > %t.log-warm.txt 2>&1
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; RUN: cat %t.log-warm.txt | FileCheck %s --check-prefix=WARM
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; diff %t/thinlto.1 %t/thinlto-warm.1
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; diff %t/thinlto.2 %t/thinlto-warm.2
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; WARM-NOT: Cache Miss
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; 3. Assume thin-one.ll has been modified to thin-one-modified.ll.
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; The merged CG data remains unchanged as this modification does not affect the hash tree built from thin-two.bc.
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; Therefore, both the first and second round runs update only this module.
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; RUN: opt -module-hash -module-summary %t/thin-one-modified.ll -o %t/thin-one.bc
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; RUN: llvm-lto2 run %t/thin-one.bc %t/thin-two.bc -o %t/thinlto-warm-modified \
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; RUN: -r %t/thin-one.bc,_f3,px -r %t/thin-one.bc,_g,x \
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; RUN: -r %t/thin-two.bc,_f1,px -r %t/thin-two.bc,_f2,px -r %t/thin-two.bc,_g,x \
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; RUN: -codegen-data-thinlto-two-rounds -cache-dir %t.cache -debug-only=lto -thinlto-threads 1 > %t.log-warm-modified.txt 2>&1
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; RUN: cat %t.log-warm-modified.txt | FileCheck %s --check-prefix=WARM-MODIFIED
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; diff %t/thinlto.1 %t/thinlto-warm-modified.1
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; diff %t/thinlto.2 %t/thinlto-warm-modified.2
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; WARM-MODIFIED: [FirstRound] Cache Miss for {{.*}}thin-one.bc
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; WARM-MODIFIED-NOT: [FirstRound] Cache Miss for {{.*}}thin-two.bc
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; WARM-MODIFIED: [SecondRound] Cache Miss for {{.*}}thin-one.bc
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; WARM-MODIFIED-NOT: [SecondRound] Cache Miss for {{.*}}thin-two.bc
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; 4. Additionally, thin-two.ll has been modified to thin-two-modified.ll.
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; In this case, the merged CG data, which is global, is updated.
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; Although the first round run updates only the thin-two.bc module,
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; as the module thin-one.bc remains the same as in step 3 above,
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; the second round run will update all modules, resulting in different binaries.
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; RUN: opt -module-hash -module-summary %t/thin-one-modified.ll -o %t/thin-one.bc
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; RUN: opt -module-hash -module-summary %t/thin-two-modified.ll -o %t/thin-two.bc
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; RUN: llvm-lto2 run %t/thin-one.bc %t/thin-two.bc -o %t/thinlto-warm-modified-all \
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; RUN: -r %t/thin-one.bc,_f3,px -r %t/thin-one.bc,_g,x \
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; RUN: -r %t/thin-two.bc,_f1,px -r %t/thin-two.bc,_f2,px -r %t/thin-two.bc,_g,x \
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; RUN: -codegen-data-thinlto-two-rounds -cache-dir %t.cache -debug-only=lto -thinlto-threads 1 > %t.log-warm-modified-all.txt 2>&1
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; RUN: cat %t.log-warm-modified-all.txt | FileCheck %s --check-prefix=WARM-MODIFIED-ALL
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; RUN: not diff %t/thinlto.1 %t/thinlto-warm-modified-all.1
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; RUN: not diff %t/thinlto.2 %t/thinlto-warm-modified-all.2
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; WARM-MODIFIED-ALL-NOT: [FirstRound] Cache Miss for {{.*}}thin-one.bc
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; WARM-MODIFIED-ALL: [FirstRound] Cache Miss for {{.*}}thin-two.bc
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; WARM-MODIFIED-ALL: [SecondRound] Cache Miss for {{.*}}thin-one.bc
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; WARM-MODIFIED-ALL: [SecondRound] Cache Miss for {{.*}}thin-two.bc
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; thin-one-modified.ll won't be outlined.
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; RUN: llvm-objdump -d %t/thinlto-warm-modified-all.1 | FileCheck %s --check-prefix=THINLTO-1-MODIFIED-ALL
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; THINLTO-1-MODIFIED-ALL-NOT: _OUTLINED_FUNCTION{{.*}}>:
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; thin-two-modified.ll will have two (longer) outlining instances (matched in the global outlined hash tree)
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; RUN: llvm-objdump -d %t/thinlto-warm-modified-all.2| FileCheck %s --check-prefix=THINLTO-2-MODIFIED-ALL
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; THINLTO-2-MODIFIED-ALL: _OUTLINED_FUNCTION{{.*}}>:
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; THINLTO-2-MODIFIED-ALL: mov
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; THINLTO-2-MODIFIED-ALL: mov
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; THINLTO-2-MODIFIED-ALL: mov
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; THINLTO-2-MODIFIED-ALL: b
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; THINLTO-2-MODIFIED-ALL: _OUTLINED_FUNCTION{{.*}}>:
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; THINLTO-2-MODIFIED-ALL: mov
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; THINLTO-2-MODIFIED-ALL: mov
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; THINLTO-2-MODIFIED-ALL: mov
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; THINLTO-2-MODIFIED-ALL: b
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; 5. Re-running it will hit the cache.
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; RUN: llvm-lto2 run %t/thin-one.bc %t/thin-two.bc -o %t/thinlto-warm-again \
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; RUN: -r %t/thin-one.bc,_f3,px -r %t/thin-one.bc,_g,x \
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; RUN: -r %t/thin-two.bc,_f1,px -r %t/thin-two.bc,_f2,px -r %t/thin-two.bc,_g,x \
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; RUN: -codegen-data-thinlto-two-rounds -cache-dir %t.cache -debug-only=lto -thinlto-threads 1 > %t.log-warm-again.txt 2>&1
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; RUN: cat %t.log-warm-again.txt | FileCheck %s --check-prefix=WARM-AGAIN
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; RUN: diff %t/thinlto-warm-modified-all.1 %t/thinlto-warm-again.1
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; RUN: diff %t/thinlto-warm-modified-all.2 %t/thinlto-warm-again.2
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; WARM-AGAIN-NOT: Cache Miss
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;--- thin-one.ll
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-darwin"
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declare i32 @g(i32, i32, i32)
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define i32 @f3() minsize {
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%1 = call i32 @g(i32 30, i32 1, i32 2);
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ret i32 %1
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}
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;--- thin-one-modified.ll
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-darwin"
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declare i32 @g(i32, i32, i32)
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define i32 @f3() minsize {
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%1 = call i32 @g(i32 31, i32 1, i32 2);
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ret i32 %1
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}
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;--- thin-two.ll
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-darwin"
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declare i32 @g(i32, i32, i32)
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define i32 @f1() minsize {
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%1 = call i32 @g(i32 10, i32 1, i32 2);
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ret i32 %1
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}
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define i32 @f2() minsize {
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%1 = call i32 @g(i32 20, i32 1, i32 2);
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ret i32 %1
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}
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;--- thin-two-modified.ll
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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target triple = "arm64-apple-darwin"
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declare i32 @g(i32, i32, i32)
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define i32 @f1() minsize {
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%1 = call i32 @g(i32 10, i32 1, i32 2);
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ret i32 %1
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}
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define i32 @f2() minsize {
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%1 = call i32 @g(i32 10, i32 1, i32 2);
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ret i32 %1
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}
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